Viață extraterestră (Romanian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Viață extraterestră" in Romanian language version.

refsWebsite

Global rank Romanian rank

56harvard.edu

18^th place

27^th place

53doi.org

2^nd place

3^rd place

29web.archive.org

1^st place

23nih.gov

4^th place

18nasa.gov

75^th place

56^th place

15arxiv.org

69^th place

132^nd place

15space.com

936^th place

732^nd place

11nytimes.com

7^th place

25^th place

7books.google.com

3^rd place

6^th place

5archive.org

6^th place

23^rd place

4bbc.com

20^th place

84^th place

4sciencemag.org

857^th place

479^th place

4bbc.co.uk

8^th place

14^th place

3newscientist.com

774^th place

615^th place

3zenodo.org

621^st place

1,171^st place

3worldcat.org

5^th place

11^th place

3universetoday.com

3,691^st place

1,569^th place

2nature.com

234^th place

260^th place

2psu.edu

207^th place

281^st place

2the-scientist.com

7,827^th place

low place

2esa.int

1,482^nd place

1,098^th place

2instituteforpalebluedots.com

low place

2sciencedaily.com

993^rd place

520^th place

2excite.com

low place

5,739^th place

2csicop.org

3,411^th place

3,990^th place

2pbs.org

198^th place

250^th place

2gallup.com

2,558^th place

1,776^th place

2nationalgeographic.com

344^th place

184^th place

2arizona.edu

1,592^nd place

646^th place

2discovery.com

1,299^th place

825^th place

2berkeley.edu

580^th place

396^th place

1washingtonpost.com

34^th place

147^th place

1etymonline.com

287^th place

191^st place

1cosmosmagazine.com

low place

4,789^th place

1statepress.com

low place

1usra.edu

2,838^th place

1,775^th place

1latimes.com

22^nd place

127^th place

1nap.edu

2,128^th place

1,545^th place

1usda.gov

438^th place

570^th place

1msoe.edu

low place

1utep.edu

low place

1hoyle.org.uk

low place

1reuters.com

49^th place

124^th place

1dailygalaxy.com

low place

1wsu.edu

3,088^th place

4,478^th place

1skymania.com

low place

1egu2012.eu

low place

1nbcnews.com

137^th place

326^th place

1ghostarchive.org

32^nd place

1,079^th place

1youtube.com

9^th place

30^th place

1uvic.ca

7,619^th place

low place

1discovermagazine.com

3,042^nd place

3,571^st place

1utexas.edu

916^th place

1,228^th place

1spaceflightnow.com

2,930^th place

2,971^st place

1researchgate.net

120^th place

137^th place

1astrobio.net

low place

3,431^st place

1exoplanet.eu

9,995^th place

6,425^th place

1ucr.edu

1,553^rd place

1,008^th place

1spacetoday.net

low place

1csmonitor.com

791^st place

1,963^rd place

1eso.org

3,034^th place

2,281^st place

1coseti.org

low place

1iap.fr

low place

1upr.edu

low place

1setileague.org

low place

1skyandtelescope.com

8,316^th place

5,256^th place

1ipap.jp

low place

1stanford.edu

179^th place

36^th place

1crisismagazine.com

low place

7,231^st place

1daviddarling.info

7,061^st place

3,469^th place

1positiveatheism.org

low place

1cosmovisions.com

low place

6,853^rd place

1wku.edu

low place

2,441^st place

1rac.com.br

low place

1antarcticaedu.com

low place

1ohiohistory.org

low place

antarcticaedu.com

„LECTURE 4: MODERN THOUGHTS ON EXTRATERRESTRIAL LIFE”. The University of Antarctica. Accesat în 25 iulie 2015.

archive.org

Filkin, David; Hawking, Stephen W. (1998). Stephen Hawking's universe: the cosmos explained. Art of Mentoring Series. Basic Books. p. 194. ISBN 978-0-465-08198-1.
Horowitz, Norman H. (1986). To Utopia and Back: The Search for Life in the Solar System. W. H. Freeman & Co. ISBN 978-0-7167-1765-2.
Arrhenius, Svante (martie 1908). Worlds in the Making: The Evolution of the Universe. trans. H. Borns. Harper & Brothers. OCLC 1935295.
Chambers, Paul (1999). Life on Mars; The Complete Story. London: Blandford. ISBN 978-0-7137-2747-0.
Chambers, Paul (1999). Life on Mars; The Complete Story. London: Blandford. ISBN 978-0-7137-2747-0.

arizona.edu

phoenix.lpl.arizona.edu

„Habitability and Biology: What are the Properties of Life?”. Phoenix Mars Mission. The University of Arizona. Arhivat din original la 2 octombrie 2013. Accesat în 6 iunie 2013. If any life exists on Mars today, scientists believe it is most likely to be in pockets of liquid water beneath the Martian surface.

lpl.arizona.edu

Showman, Adam P.; Malhotra, Renu (1999). „The Galilean Satellites” (PDF). Science. 286 (5437): 77–84. doi:10.1126/science.286.5437.77. PMID 10506564. Arhivat din original (PDF) la 14 mai 2011. Accesat în 14 noiembrie 2021.

arxiv.org

Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (iunie 2011). „Would Contact with Extraterrestrials Benefit or Harm Humanity? A Scenario Analysis”. Acta Astronautica. 68 (11): 2114–2129. arXiv:1104.4462 . Bibcode:2011AcAau..68.2114B. doi:10.1016/j.actaastro.2010.10.012.
Loeb, Abraham (octombrie 2014). „The Habitable Epoch of the Early Universe”. International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613 . Bibcode:2014IJAsB..13..337L. CiteSeerX 10.1.1.748.4820 . doi:10.1017/S1473550414000196.
Petigura, Eric A.; Howard, Andrew W.; Marcy, Geoffrey W. (31 octombrie 2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences of the United States of America. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (iunie 2010). „The Compositional Diversity of Extrasolar Terrestrial Planets. I. In Situ Simulations”. The Astrophysical Journal. 715 (2): 1050–1070. arXiv:1004.0971 . Bibcode:2010ApJ...715.1050B. doi:10.1088/0004-637X/715/2/1050.
Wesson, P (2010). „Panspermia, Past and Present: Astrophysical and Biophysical Conditions for the Dissemination of Life in Space”. Sp. Sci.Rev. 1–4. 156 (1–4): 239–252. arXiv:1011.0101 . Bibcode:2010SSRv..156..239W. doi:10.1007/s11214-010-9671-x.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (septembrie 2012). „Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA” (PDF). The Astrophysical Journal Letters. 757 (1). L4. arXiv:1208.5498 . Bibcode:2012ApJ...757L...4J. doi:10.1088/2041-8205/757/1/L4.
Tenenbaum, P.; Jenkins, J. M.; Seader, S.; Burke, C. J.; Christiansen, J. L.; Rowe, J. F.; Caldwell, D. A.; Clarke, B. D.; Li, J.; Quintana, E. V.; Smith, J. C.; Thompson, S. E.; Twicken, J. D.; Borucki, W. J.; Batalha, N. M.; Cote, M. T.; Haas, M. R.; Hunter, R. C.; Sanderfer, D. T.; Girouard, F. R.; Hall, J. R.; Ibrahim, K.; Klaus, T. C.; McCauliff, S. D.; Middour, C. K.; Sabale, A.; Uddin, A. K.; Wohler, B.; Barclay, T.; Still, M. (2013). „Detection of Potential Transit Signals in the First 12 Quarters of Kepler Mission Data”. The Astrophysical Journal Supplement Series. 206 (1): 5. arXiv:1212.2915 . Bibcode:2013ApJS..206....5T. doi:10.1088/0067-0049/206/1/5.
Santerne, A.; Díaz, R. F.; Almenara, J.-M.; Lethuillier, A.; Deleuil, M.; Moutou, C. (2013). „Astrophysical false positives in exoplanet transit surveys: Why do we need bright stars?”. Sf2A-2013: Proceedings of the Annual Meeting of the French Society of Astronomy and Astrophysics: 555. arXiv:1310.2133 . Bibcode:2013sf2a.conf..555S.
Cassan, A.; et al. (11 ianuarie 2012). „One or more bound planets per Milky Way star from microlensing observations”. Nature. 481 (7380): 167–169. arXiv:1202.0903 . Bibcode:2012Natur.481..167C. doi:10.1038/nature10684. PMID 22237108.
Petigura, E. A.; Howard, A. W.; Marcy, G. W. (2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Strigari, L. E.; Barnabè, M.; Marshall, P. J.; Blandford, R. D. (2012). „Nomads of the Galaxy”. Monthly Notices of the Royal Astronomical Society. 423 (2): 1856–1865. arXiv:1201.2687 . Bibcode:2012MNRAS.423.1856S. doi:10.1111/j.1365-2966.2012.21009.x.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2013). „A young protoplanet candidate embedded in the circumstellar disk of HD 100546”. Astrophysical Journal. 766 (1). L1. arXiv:1302.7122 . Bibcode:2013ApJ...766L...1Q. doi:10.1088/2041-8205/766/1/l1.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2014). „Confirmation and characterization of the protoplanet HD100546 b - Direct evidence for gas giant planet formation at 50 au”. Astrophysical Journal. 807 (1). 64. arXiv:1412.5173 . Bibcode:2015ApJ...807...64Q. doi:10.1088/0004-637X/807/1/64.
Marcy, G.; Butler, R.; Fischer, D.; et al. (2005). „Observed Properties of Exoplanets: Masses, Orbits and Metallicities”. Progress of Theoretical Physics Supplement. 158: 24–42. arXiv:astro-ph/0505003 . Bibcode:2005PThPS.158...24M. doi:10.1143/PTPS.158.24. Arhivat din original la 2 octombrie 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (ianuarie 2013). „Characterizing the Cool KOIs. IV. Kepler-32 as a Prototype for the Formation of Compact Planetary Systems throughout the Galaxy”. The Astrophysical Journal. 764 (1). 105. arXiv:1301.0023 . Bibcode:2013ApJ...764..105S. doi:10.1088/0004-637X/764/1/105.

astrobio.net

Choi, Charles Q. (10 iunie 2010). „The Chance for Life on Io”. Astrobiology Magazine. Accesat în 25 mai 2013.

bbc.co.uk

„Mercury's water ice at north pole finally proven”. BBC. 30 noiembrie 2012. Accesat în 30 noiembrie 2012.
Amos, Jonathan (22 iulie 2011). „Mars rover aims for deep crater”. BBC News. Accesat în 22 iulie 2011.

news.bbc.co.uk

Redfern, Martin (25 May 2004). "Venus clouds 'might harbour life'". BBC News. Retrieved 30 December 2015.
„Hawking warns over alien beings”. BBC News. 25 aprilie 2010. Accesat în 2 mai 2010.

bbc.com

Ghosh, Pallab (12 februarie 2015). „Scientists in US are urged to seek contact with aliens”. BBC News.
Virk, Kameron (7 august 2019). „Tardigrades: 'Water bears' stuck on the moon after crash”. BBC. Accesat în 26 martie 2021.
Europa may be home to alien life. Melissa Hogenboom, BBC News. 26 March 2015.
Ghosh, Pallab (12 februarie 2015). „Scientist: 'Try to contact aliens'”. BBC News. Accesat în 12 februarie 2015.

berkeley.edu

newscenter.berkeley.edu

Sanders, R. (4 noiembrie 2013). „Astronomers answer key question: How common are habitable planets?”. newscenter.berkeley.edu.

setiathome.berkeley.edu

„Regarding Messaging To Extraterrestrial Intelligence (METI) / Active Searches For Extraterrestrial Intelligence (Active SETI)”. University of California, Berkeley. 13 februarie 2015. Accesat în 14 februarie 2015.

books.google.com

Steiger, Brad; White, John, ed. (1986). Other Worlds, Other Universes. Health Research Books. p. 3. ISBN 978-0-7873-1291-6.
Rauchfuss, Horst (2008). Chemical Evolution and the Origin of Life. trans. Terence N. Mitchell. Springer. ISBN 978-3-540-78822-5.
Gonzalez, Guillermo; Richards, Jay Wesley (2004). The privileged planet: how our place in the cosmos is designed for discovery. Regnery Publishing. pp. 343–345. ISBN 978-0-89526-065-9.
Mix, Lucas John (2009). Life in space: astrobiology for everyone. Harvard University Press. p. 76. ISBN 978-0-674-03321-4. Accesat în 8 august 2011.
Scientific American, "Is The Moon Inhabited?" (în engleză). Munn & Company. 20 iulie 1878. p. 36.
Mukundchandra G. Raval (2016). Meru: The Center of our Earth. Notion Press. ISBN 978-1-945400-10-0.
Crowe, Michael J. (1999). The Extraterrestrial Life Debate, 1750–1900. Courier Dover Publications. ISBN 978-0-486-40675-6.

coseti.org

„The Search for Extraterrestrial Intelligence (SETI) in the Optical Spectrum”. The Columbus Optical SETI Observatory.

cosmosmagazine.com

Fuge, Lauren (30 octombrie 2021). „NASA proposes playbook for communicating the discovery of alien life - Sensationalising aliens is so 20th century, according to NASA scientists”. Cosmos. Accesat în 1 noiembrie 2021.

cosmovisions.com

„Rheita.htm”. cosmovisions.com.

crisismagazine.com

Wiker, Benjamin D. (4 noiembrie 2002). „Alien Ideas: Christianity and the Search for Extraterrestrial Life”. Crisis Magazine. Arhivat din original la 10 februarie 2003.

csicop.org

Schenkel, Peter (2006). „SETI Requires a Skeptical Reappraisal”. Skeptical Inquirer. Accesat în 28 iunie 2009.
Moldwin, Mark (noiembrie 2004). „Why SETI is science and UFOlogy is not”. Skeptical Inquirer. Arhivat din original la 13 martie 2009.

csmonitor.com

Spotts, Peter N. (28 februarie 2005). „Sea boosts hope of finding signs of life on Mars”. The Christian Science Monitor. Accesat în 18 decembrie 2006.

dailygalaxy.com

„Did the Early Venus Harbor Life? (Weekend Feature)”. The Daily Galaxy. 2 iunie 2012. Arhivat din original la 28 octombrie 2017. Accesat în 22 mai 2016.

daviddarling.info

„Flammarion, (Nicolas) Camille (1842–1925)”. The Internet Encyclopedia of Science.

discovermagazine.com

blogs.discovermagazine.com

Plait, Phil (17 noiembrie 2011). „Huge lakes of water may exist under Europa's ice”. Discover. Bad Astronomy Blog. Arhivat din original la 9 aprilie 2012. Accesat în 14 noiembrie 2021.

discovery.com

news.discovery.com

„Top 10 Places To Find Alien Life : Discovery News”. News.discovery.com. 8 iunie 2010. Arhivat din original la 22 octombrie 2012. Accesat în 13 iunie 2012.

dsc.discovery.com

Crenson, Matt (6 august 2006). „Experts: Little Evidence of Life on Mars”. Associated Press. Arhivat din original la 16 aprilie 2011. Accesat în 8 martie 2011.

doi.org

Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (iunie 2011). „Would Contact with Extraterrestrials Benefit or Harm Humanity? A Scenario Analysis”. Acta Astronautica. 68 (11): 2114–2129. arXiv:1104.4462 . Bibcode:2011AcAau..68.2114B. doi:10.1016/j.actaastro.2010.10.012.
Green, James; et al. (27 octombrie 2021). „Call for a framework for reporting evidence for life beyond Earth”. Nature. 598: 575–579. doi:10.1038/s41586-021-03804-9. Accesat în 1 noiembrie 2021.
Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Loeb, Abraham (octombrie 2014). „The Habitable Epoch of the Early Universe”. International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613 . Bibcode:2014IJAsB..13..337L. CiteSeerX 10.1.1.748.4820 . doi:10.1017/S1473550414000196.
Petigura, Eric A.; Howard, Andrew W.; Marcy, Geoffrey W. (31 octombrie 2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences of the United States of America. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (iunie 2010). „The Compositional Diversity of Extrasolar Terrestrial Planets. I. In Situ Simulations”. The Astrophysical Journal. 715 (2): 1050–1070. arXiv:1004.0971 . Bibcode:2010ApJ...715.1050B. doi:10.1088/0004-637X/715/2/1050.
Pace, Norman R. (20 ianuarie 2001). „The universal nature of biochemistry”. Proceedings of the National Academy of Sciences of the United States of America. 98 (3): 805–808. Bibcode:2001PNAS...98..805P. doi:10.1073/pnas.98.3.805 . PMC 33372 . PMID 11158550.
National Research Council (2007). „6.2.2: Nonpolar Solvents”. The Limits of Organic Life in Planetary Systems. The National Academies Press. p. 74. doi:10.17226/11919. ISBN 978-0-309-10484-5.
Summons, Roger E.; Amend, Jan P.; Bish, David; Buick, Roger; Cody, George D.; Des Marais, David J.; Dromart, Gilles; Eigenbrode, Jennifer L.; et al. (2011). „Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group” (PDF). Astrobiology. 11 (2): 157–81. Bibcode:2011AsBio..11..157S. doi:10.1089/ast.2010.0506. PMID 21417945. There is general consensus that extant microbial life on Mars would probably exist (if at all) in the subsurface and at low abundance.
Michalski, Joseph R.; Cuadros, Javier; Niles, Paul B.; Parnell, John; Deanne Rogers, A.; Wright, Shawn P. (2013). „Groundwater activity on Mars and implications for a deep biosphere”. Nature Geoscience. 6 (2): 133–8. Bibcode:2013NatGe...6..133M. doi:10.1038/ngeo1706.
Kargel, Jeffrey S.; Kaye, Jonathan Z.; Head, James W.; Marion, Giles M.; Sassen, Roger; et al. (noiembrie 2000). „Europa's Crust and Ocean: Origin, Composition, and the Prospects for Life”. Icarus. 148 (1): 226–265. Bibcode:2000Icar..148..226K. doi:10.1006/icar.2000.6471.
Thomson, William (august 1871). „The British Association Meeting at Edinburgh”. Nature. 4 (92): 261–278. Bibcode:1871Natur...4..261.. doi:10.1038/004261a0. PMC 2070380 . We must regard it as probably to the highest degree that there are countless seed-bearing meteoritic stones moving through space.
Demets, René (octombrie 2012). „Darwin's Contribution to the Development of the Panspermia Theory”. Astrobiology. 12 (10): 946–950. Bibcode:2012AsBio..12..946D. doi:10.1089/ast.2011.0790. PMID 23078643.
Crick, F. H.; Orgel, L. E. (1973). „Directed Panspermia”. Icarus. 19 (3): 341–348. Bibcode:1973Icar...19..341C. doi:10.1016/0019-1035(73)90110-3.
Orgel, L. E.; Crick, F. H. (ianuarie 1993). „Anticipating an RNA world. Some past speculations on the origin of life: Where are they today?”. FASEB Journal. 7 (1): 238–239. doi:10.1096/fasebj.7.1.7678564. PMID 7678564.
Dartnell, Lewis R.; Nordheim, Tom Andre; Patel, Manish R.; Mason, Jonathon P.; et al. (septembrie 2015). „Constraints on a potential aerial biosphere on Venus: I. Cosmic rays”. Icarus. 257: 396–405. Bibcode:2015Icar..257..396D. doi:10.1016/j.icarus.2015.05.006.
Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Schulze-Makuch, Dirk; Crawford, Ian A. (2018). „Was There an Early Habitability Window for Earth's Moon?”. Astrobiology. 18 (8): 985–988. Bibcode:2018AsBio..18..985S. doi:10.1089/ast.2018.1844. PMC 6225594 . PMID 30035616.
Ojha, L.; Wilhelm, M. B.; Murchie, S. L.; McEwen, A. S.; Wray, J. J.; Hanley, J.; Massé, M.; Chojnacki, M. (2015). „Spectral evidence for hydrated salts in recurring slope lineae on Mars”. Nature Geoscience. 8 (11): 829–832. Bibcode:2015NatGe...8..829O. doi:10.1038/ngeo2546.
Grotzinger, John P. (24 ianuarie 2014). „Introduction to Special Issue – Habitability, Taphonomy, and the Search for Organic Carbon on Mars”. Science. 343 (6169): 386–387. Bibcode:2014Sci...343..386G. doi:10.1126/science.1249944 . PMID 24458635.
Grotzinger, J. P.; et al. (24 ianuarie 2014). „A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars”. Science. 343 (6169): 1242777. Bibcode:2014Sci...343A.386G. CiteSeerX 10.1.1.455.3973 . doi:10.1126/science.1242777. PMID 24324272.
Küppers, M.; O'Rourke, L.; Bockelée-Morvan, D.; Zakharov, V.; Lee, S.; Von Allmen, P.; Carry, B.; Teyssier, D.; Marston, A.; Müller, T.; Crovisier, J.; Barucci, M. A.; Moreno, R. (23 ianuarie 2014). „Localized sources of water vapour on the dwarf planet (1) Ceres”. Nature. 505 (7484): 525–527. Bibcode:2014Natur.505..525K. doi:10.1038/nature12918. ISSN 0028-0836. PMID 24451541.
Campins, H.; Comfort, C. M. (23 ianuarie 2014). „Solar system: Evaporating asteroid”. Nature. 505 (7484): 487–488. Bibcode:2014Natur.505..487C. doi:10.1038/505487a . PMID 24451536.
Ponnamperuma, Cyril; Molton, Peter (ianuarie 1973). „The prospect of life on Jupiter”. Space Life Sciences. 4 (1): 32–44. Bibcode:1973SLSci...4...32P. doi:10.1007/BF02626340. PMID 4197410.
Irwin, Louis Neal; Schulze-Makuch, Dirk (iunie 2001). „Assessing the Plausibility of Life on Other Worlds”. Astrobiology. 1 (2): 143–160. Bibcode:2001AsBio...1..143I. doi:10.1089/153110701753198918. PMID 12467118.
Vance, Steve; Bouffard, Mathieu; Choukroun, Mathieu; Sotina, Christophe (12 aprilie 2014). „Ganymede's internal structure including thermodynamics of magnesium sulfate oceans in contact with ice”. Planetary and Space Science. 96: 62–70. Bibcode:2014P&SS...96...62V. doi:10.1016/j.pss.2014.03.011.
Kuskov, O. L.; Kronrod, V. A. (2005). „Internal structure of Europa and Callisto”. Icarus. 177 (2): 550–569. Bibcode:2005Icar..177..550K. doi:10.1016/j.icarus.2005.04.014.
Showman, Adam P.; Malhotra, Renu (1999). „The Galilean Satellites” (PDF). Science. 286 (5437): 77–84. doi:10.1126/science.286.5437.77. PMID 10506564. Arhivat din original (PDF) la 14 mai 2011. Accesat în 14 noiembrie 2021.
Coustenis, A.; et al. (martie 2009). „TandEM: Titan and Enceladus mission”. Experimental Astronomy. 23 (3): 893–946. Bibcode:2009ExA....23..893C. doi:10.1007/s10686-008-9103-z .
Lovett, Richard A. (31 mai 2011). „Enceladus named sweetest spot for alien life”. Nature. doi:10.1038/news.2011.337. Accesat în 3 iunie 2011.
Strobel, Darrell F. (2010). „Molecular hydrogen in Titan's atmosphere: Implications of the measured tropospheric and thermospheric mole fractions”. Icarus. 208 (2): 878–886. Bibcode:2010Icar..208..878S. doi:10.1016/j.icarus.2010.03.003.
McKay, C. P.; Smith, H. D. (2005). „Possibilities for methanogenic life in liquid methane on the surface of Titan”. Icarus. 178 (1): 274–276. Bibcode:2005Icar..178..274M. doi:10.1016/j.icarus.2005.05.018.
Wesson, P (2010). „Panspermia, Past and Present: Astrophysical and Biophysical Conditions for the Dissemination of Life in Space”. Sp. Sci.Rev. 1–4. 156 (1–4): 239–252. arXiv:1011.0101 . Bibcode:2010SSRv..156..239W. doi:10.1007/s11214-010-9671-x.
Hussmann, Hauke; Sohl, Frank; Spohn, Tilman (noiembrie 2006). „Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects”. Icarus. 185 (1): 258–273. Bibcode:2006Icar..185..258H. doi:10.1016/j.icarus.2006.06.005.
McKay, David S.; Gibson, Everett K., Jr.; Thomas-Keprta, Kathie L.; Vali, Hojatollah; Romanek, Christopher S.; et al. (august 1996). „Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001”. Science. 273 (5277): 924–930. Bibcode:1996Sci...273..924M. doi:10.1126/science.273.5277.924. PMID 8688069.
Klein, Harold P.; Levin, Gilbert V.; Levin, Gilbert V.; Oyama, Vance I.; Lederberg, Joshua; Rich, Alexander; Hubbard, Jerry S.; Hobby, George L.; Straat, Patricia A.; Berdahl, Bonnie J.; Carle, Glenn C.; Brown, Frederick S.; Johnson, Richard D. (1 octombrie 1976). „The Viking Biological Investigation: Preliminary Results”. Science. 194 (4260): 99–105. Bibcode:1976Sci...194...99K. doi:10.1126/science.194.4260.99. PMID 17793090.
Beegle, Luther W.; Wilson, Michael G.; Abilleira, Fernando; Jordan, James F.; Wilson, Gregory R. (august 2007). „A Concept for NASA's Mars 2016 Astrobiology Field Laboratory”. Astrobiology. 7 (4): 545–577. Bibcode:2007AsBio...7..545B. doi:10.1089/ast.2007.0153. PMID 17723090.
Callahan, M.P.; Smith, K.E.; Cleaves, H.J.; Ruzica, J.; Stern, J.C.; Glavin, D.P.; House, C.H.; Dworkin, J.P. (11 august 2011). „Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases”. Proceedings of the National Academy of Sciences. 108 (34): 13995–13998. Bibcode:2011PNAS..10813995C. doi:10.1073/pnas.1106493108 . PMC 3161613 . PMID 21836052.
Kwok, Sun; Zhang, Yong (26 octombrie 2011). „Mixed aromatic–aliphatic organic nanoparticles as carriers of unidentified infrared emission features”. Nature. 479 (7371): 80–3. Bibcode:2011Natur.479...80K. doi:10.1038/nature10542. PMID 22031328.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (septembrie 2012). „Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA” (PDF). The Astrophysical Journal Letters. 757 (1). L4. arXiv:1208.5498 . Bibcode:2012ApJ...757L...4J. doi:10.1088/2041-8205/757/1/L4.
Whitmire, Daniel P.; Wright, David P. (aprilie 1980). „Nuclear waste spectrum as evidence of technological extraterrestrial civilizations”. Icarus. 42 (1): 149–156. Bibcode:1980Icar...42..149W. doi:10.1016/0019-1035(80)90253-5.
Tenenbaum, P.; Jenkins, J. M.; Seader, S.; Burke, C. J.; Christiansen, J. L.; Rowe, J. F.; Caldwell, D. A.; Clarke, B. D.; Li, J.; Quintana, E. V.; Smith, J. C.; Thompson, S. E.; Twicken, J. D.; Borucki, W. J.; Batalha, N. M.; Cote, M. T.; Haas, M. R.; Hunter, R. C.; Sanderfer, D. T.; Girouard, F. R.; Hall, J. R.; Ibrahim, K.; Klaus, T. C.; McCauliff, S. D.; Middour, C. K.; Sabale, A.; Uddin, A. K.; Wohler, B.; Barclay, T.; Still, M. (2013). „Detection of Potential Transit Signals in the First 12 Quarters of Kepler Mission Data”. The Astrophysical Journal Supplement Series. 206 (1): 5. arXiv:1212.2915 . Bibcode:2013ApJS..206....5T. doi:10.1088/0067-0049/206/1/5.
Cassan, A.; et al. (11 ianuarie 2012). „One or more bound planets per Milky Way star from microlensing observations”. Nature. 481 (7380): 167–169. arXiv:1202.0903 . Bibcode:2012Natur.481..167C. doi:10.1038/nature10684. PMID 22237108.
Petigura, E. A.; Howard, A. W.; Marcy, G. W. (2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Strigari, L. E.; Barnabè, M.; Marshall, P. J.; Blandford, R. D. (2012). „Nomads of the Galaxy”. Monthly Notices of the Royal Astronomical Society. 423 (2): 1856–1865. arXiv:1201.2687 . Bibcode:2012MNRAS.423.1856S. doi:10.1111/j.1365-2966.2012.21009.x.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2013). „A young protoplanet candidate embedded in the circumstellar disk of HD 100546”. Astrophysical Journal. 766 (1). L1. arXiv:1302.7122 . Bibcode:2013ApJ...766L...1Q. doi:10.1088/2041-8205/766/1/l1.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2014). „Confirmation and characterization of the protoplanet HD100546 b - Direct evidence for gas giant planet formation at 50 au”. Astrophysical Journal. 807 (1). 64. arXiv:1412.5173 . Bibcode:2015ApJ...807...64Q. doi:10.1088/0004-637X/807/1/64.
Burchell, M. J. (2006). „W(h)ither the Drake equation?”. International Journal of Astrobiology. 5 (3): 243–250. Bibcode:2006IJAsB...5..243B. doi:10.1017/S1473550406003107.
Marcy, G.; Butler, R.; Fischer, D.; et al. (2005). „Observed Properties of Exoplanets: Masses, Orbits and Metallicities”. Progress of Theoretical Physics Supplement. 158: 24–42. arXiv:astro-ph/0505003 . Bibcode:2005PThPS.158...24M. doi:10.1143/PTPS.158.24. Arhivat din original la 2 octombrie 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (ianuarie 2013). „Characterizing the Cool KOIs. IV. Kepler-32 as a Prototype for the Formation of Compact Planetary Systems throughout the Galaxy”. The Astrophysical Journal. 764 (1). 105. arXiv:1301.0023 . Bibcode:2013ApJ...764..105S. doi:10.1088/0004-637X/764/1/105.
Evans, J. E.; Maunder, E. W. (iunie 1903). „Experiments as to the actuality of the "Canals" observed on Mars”. Monthly Notices of the Royal Astronomical Society. 63 (8): 488–499. Bibcode:1903MNRAS..63..488E. doi:10.1093/mnras/63.8.488 .
Cross, Anne (2004). „The Flexibility of Scientific Rhetoric: A Case Study of UFO Researchers”. Qualitative Sociology. 27 (1): 3–34. doi:10.1023/B:QUAS.0000015542.28438.41.
Ailleris, Philippe (2011). „The lure of local SETI: Fifty years of field experiments”. Acta Astronautica. 68 (1–2): 2–15. Bibcode:2011AcAau..68....2A. doi:10.1016/j.actaastro.2009.12.011.

egu2012.eu

media.egu2012.eu

de Vera, J.-P.; Kohler, Ulrich (26 aprilie 2012). „The adaptation potential of extremophiles to Martian surface conditions and its implication for the habitability of Mars” (PDF). European Geosciences Union. Arhivat din original (PDF) la 4 mai 2012. Accesat în 27 aprilie 2012.

esa.int

„Was Venus once a habitable planet?”. European Space Agency. 24 iunie 2010. Accesat în 22 mai 2016.
„ExoMars rover”. ESA. Accesat în 14 aprilie 2014.

eso.org

Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (septembrie 2012). „Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA” (PDF). The Astrophysical Journal Letters. 757 (1). L4. arXiv:1208.5498 . Bibcode:2012ApJ...757L...4J. doi:10.1088/2041-8205/757/1/L4.

etymonline.com

Harper, Douglas. "extraterrestrial". Online Etymology Dictionary.

excite.com

apnews.excite.com

„Sweet! Astronomers spot sugar molecule near star”. Associated Press. 29 august 2012. Accesat în 31 august 2012.
Katz, Gregory (20 iulie 2015). „Searching for ET: Hawking to look for extraterrestrial life”. Excite!. Associated Press. Accesat în 20 iulie 2015.

exoplanet.eu

Schneider, Jean (10 septembrie 2011). „Interactive Extra-solar Planets Catalog”. The Extrasolar Planets Encyclopaedia. Accesat în 30 ianuarie 2012.

gallup.com

news.gallup.com

Saad, Lydia (20 mai 2021). „Do Americans Believe in UFOs?”. Gallop. Gallop, Inc. Accesat în 24 august 2021.
Saad, Lydia (20 august 2021). „Larger Minority in U.S. Says Some UFOs Are Alien Spacecraft”. Gallup. Gallup, Inc. Accesat în 24 august 2021.

ghostarchive.org

„Video (00:51) – Jupiter's 'Club Sandwich' Moon”. NASA. 1 mai 2014. Arhivat din original la 28 octombrie 2021. Accesat în 2 mai 2014.

harvard.edu

adsabs.harvard.edu

Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (iunie 2011). „Would Contact with Extraterrestrials Benefit or Harm Humanity? A Scenario Analysis”. Acta Astronautica. 68 (11): 2114–2129. arXiv:1104.4462 . Bibcode:2011AcAau..68.2114B. doi:10.1016/j.actaastro.2010.10.012.
Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Loeb, Abraham (octombrie 2014). „The Habitable Epoch of the Early Universe”. International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613 . Bibcode:2014IJAsB..13..337L. CiteSeerX 10.1.1.748.4820 . doi:10.1017/S1473550414000196.
Rampelotto, P. H. (aprilie 2010). Panspermia: A Promising Field of Research (PDF). Astrobiology Science Conference 2010: Evolution and Life: Surviving Catastrophes and Extremes on Earth and Beyond. 20–26 April 2010. League City, Texas. Bibcode:2010LPICo1538.5224R.
Petigura, Eric A.; Howard, Andrew W.; Marcy, Geoffrey W. (31 octombrie 2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences of the United States of America. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (iunie 2010). „The Compositional Diversity of Extrasolar Terrestrial Planets. I. In Situ Simulations”. The Astrophysical Journal. 715 (2): 1050–1070. arXiv:1004.0971 . Bibcode:2010ApJ...715.1050B. doi:10.1088/0004-637X/715/2/1050.
Pace, Norman R. (20 ianuarie 2001). „The universal nature of biochemistry”. Proceedings of the National Academy of Sciences of the United States of America. 98 (3): 805–808. Bibcode:2001PNAS...98..805P. doi:10.1073/pnas.98.3.805 . PMC 33372 . PMID 11158550.
Summons, Roger E.; Amend, Jan P.; Bish, David; Buick, Roger; Cody, George D.; Des Marais, David J.; Dromart, Gilles; Eigenbrode, Jennifer L.; et al. (2011). „Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group” (PDF). Astrobiology. 11 (2): 157–81. Bibcode:2011AsBio..11..157S. doi:10.1089/ast.2010.0506. PMID 21417945. There is general consensus that extant microbial life on Mars would probably exist (if at all) in the subsurface and at low abundance.
Michalski, Joseph R.; Cuadros, Javier; Niles, Paul B.; Parnell, John; Deanne Rogers, A.; Wright, Shawn P. (2013). „Groundwater activity on Mars and implications for a deep biosphere”. Nature Geoscience. 6 (2): 133–8. Bibcode:2013NatGe...6..133M. doi:10.1038/ngeo1706.
Kargel, Jeffrey S.; Kaye, Jonathan Z.; Head, James W.; Marion, Giles M.; Sassen, Roger; et al. (noiembrie 2000). „Europa's Crust and Ocean: Origin, Composition, and the Prospects for Life”. Icarus. 148 (1): 226–265. Bibcode:2000Icar..148..226K. doi:10.1006/icar.2000.6471.
Thomson, William (august 1871). „The British Association Meeting at Edinburgh”. Nature. 4 (92): 261–278. Bibcode:1871Natur...4..261.. doi:10.1038/004261a0. PMC 2070380 . We must regard it as probably to the highest degree that there are countless seed-bearing meteoritic stones moving through space.
Demets, René (octombrie 2012). „Darwin's Contribution to the Development of the Panspermia Theory”. Astrobiology. 12 (10): 946–950. Bibcode:2012AsBio..12..946D. doi:10.1089/ast.2011.0790. PMID 23078643.
Hoyle, Fred; Wickramasinghe, Chandra; Watson, John (1986). Viruses from Space and Related Matters (PDF). University College Cardiff Press. Bibcode:1986vfsr.book.....H. ISBN 978-0-906449-93-6. Arhivat din original (PDF) la 18 octombrie 2016. Accesat în 14 noiembrie 2021.
Crick, F. H.; Orgel, L. E. (1973). „Directed Panspermia”. Icarus. 19 (3): 341–348. Bibcode:1973Icar...19..341C. doi:10.1016/0019-1035(73)90110-3.
Dartnell, Lewis R.; Nordheim, Tom Andre; Patel, Manish R.; Mason, Jonathon P.; et al. (septembrie 2015). „Constraints on a potential aerial biosphere on Venus: I. Cosmic rays”. Icarus. 257: 396–405. Bibcode:2015Icar..257..396D. doi:10.1016/j.icarus.2015.05.006.
Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Schulze-Makuch, Dirk; Crawford, Ian A. (2018). „Was There an Early Habitability Window for Earth's Moon?”. Astrobiology. 18 (8): 985–988. Bibcode:2018AsBio..18..985S. doi:10.1089/ast.2018.1844. PMC 6225594 . PMID 30035616.
Ojha, L.; Wilhelm, M. B.; Murchie, S. L.; McEwen, A. S.; Wray, J. J.; Hanley, J.; Massé, M.; Chojnacki, M. (2015). „Spectral evidence for hydrated salts in recurring slope lineae on Mars”. Nature Geoscience. 8 (11): 829–832. Bibcode:2015NatGe...8..829O. doi:10.1038/ngeo2546.
Grotzinger, John P. (24 ianuarie 2014). „Introduction to Special Issue – Habitability, Taphonomy, and the Search for Organic Carbon on Mars”. Science. 343 (6169): 386–387. Bibcode:2014Sci...343..386G. doi:10.1126/science.1249944 . PMID 24458635.
Grotzinger, J. P.; et al. (24 ianuarie 2014). „A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars”. Science. 343 (6169): 1242777. Bibcode:2014Sci...343A.386G. CiteSeerX 10.1.1.455.3973 . doi:10.1126/science.1242777. PMID 24324272.
Küppers, M.; O'Rourke, L.; Bockelée-Morvan, D.; Zakharov, V.; Lee, S.; Von Allmen, P.; Carry, B.; Teyssier, D.; Marston, A.; Müller, T.; Crovisier, J.; Barucci, M. A.; Moreno, R. (23 ianuarie 2014). „Localized sources of water vapour on the dwarf planet (1) Ceres”. Nature. 505 (7484): 525–527. Bibcode:2014Natur.505..525K. doi:10.1038/nature12918. ISSN 0028-0836. PMID 24451541.
Campins, H.; Comfort, C. M. (23 ianuarie 2014). „Solar system: Evaporating asteroid”. Nature. 505 (7484): 487–488. Bibcode:2014Natur.505..487C. doi:10.1038/505487a . PMID 24451536.
Ponnamperuma, Cyril; Molton, Peter (ianuarie 1973). „The prospect of life on Jupiter”. Space Life Sciences. 4 (1): 32–44. Bibcode:1973SLSci...4...32P. doi:10.1007/BF02626340. PMID 4197410.
Irwin, Louis Neal; Schulze-Makuch, Dirk (iunie 2001). „Assessing the Plausibility of Life on Other Worlds”. Astrobiology. 1 (2): 143–160. Bibcode:2001AsBio...1..143I. doi:10.1089/153110701753198918. PMID 12467118.
Vance, Steve; Bouffard, Mathieu; Choukroun, Mathieu; Sotina, Christophe (12 aprilie 2014). „Ganymede's internal structure including thermodynamics of magnesium sulfate oceans in contact with ice”. Planetary and Space Science. 96: 62–70. Bibcode:2014P&SS...96...62V. doi:10.1016/j.pss.2014.03.011.
Kuskov, O. L.; Kronrod, V. A. (2005). „Internal structure of Europa and Callisto”. Icarus. 177 (2): 550–569. Bibcode:2005Icar..177..550K. doi:10.1016/j.icarus.2005.04.014.
Coustenis, A.; et al. (martie 2009). „TandEM: Titan and Enceladus mission”. Experimental Astronomy. 23 (3): 893–946. Bibcode:2009ExA....23..893C. doi:10.1007/s10686-008-9103-z .
Strobel, Darrell F. (2010). „Molecular hydrogen in Titan's atmosphere: Implications of the measured tropospheric and thermospheric mole fractions”. Icarus. 208 (2): 878–886. Bibcode:2010Icar..208..878S. doi:10.1016/j.icarus.2010.03.003.
McKay, C. P.; Smith, H. D. (2005). „Possibilities for methanogenic life in liquid methane on the surface of Titan”. Icarus. 178 (1): 274–276. Bibcode:2005Icar..178..274M. doi:10.1016/j.icarus.2005.05.018.
Wickramasinghe, Chandra (iunie 2011). „Viva Panspermia”. The Observatory. Bibcode:2011Obs...131..130W.
Wesson, P (2010). „Panspermia, Past and Present: Astrophysical and Biophysical Conditions for the Dissemination of Life in Space”. Sp. Sci.Rev. 1–4. 156 (1–4): 239–252. arXiv:1011.0101 . Bibcode:2010SSRv..156..239W. doi:10.1007/s11214-010-9671-x.
Hussmann, Hauke; Sohl, Frank; Spohn, Tilman (noiembrie 2006). „Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects”. Icarus. 185 (1): 258–273. Bibcode:2006Icar..185..258H. doi:10.1016/j.icarus.2006.06.005.
McKay, David S.; Gibson, Everett K., Jr.; Thomas-Keprta, Kathie L.; Vali, Hojatollah; Romanek, Christopher S.; et al. (august 1996). „Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001”. Science. 273 (5277): 924–930. Bibcode:1996Sci...273..924M. doi:10.1126/science.273.5277.924. PMID 8688069.
Klein, Harold P.; Levin, Gilbert V.; Levin, Gilbert V.; Oyama, Vance I.; Lederberg, Joshua; Rich, Alexander; Hubbard, Jerry S.; Hobby, George L.; Straat, Patricia A.; Berdahl, Bonnie J.; Carle, Glenn C.; Brown, Frederick S.; Johnson, Richard D. (1 octombrie 1976). „The Viking Biological Investigation: Preliminary Results”. Science. 194 (4260): 99–105. Bibcode:1976Sci...194...99K. doi:10.1126/science.194.4260.99. PMID 17793090.
Beegle, Luther W.; Wilson, Michael G.; Abilleira, Fernando; Jordan, James F.; Wilson, Gregory R. (august 2007). „A Concept for NASA's Mars 2016 Astrobiology Field Laboratory”. Astrobiology. 7 (4): 545–577. Bibcode:2007AsBio...7..545B. doi:10.1089/ast.2007.0153. PMID 17723090.
Callahan, M.P.; Smith, K.E.; Cleaves, H.J.; Ruzica, J.; Stern, J.C.; Glavin, D.P.; House, C.H.; Dworkin, J.P. (11 august 2011). „Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases”. Proceedings of the National Academy of Sciences. 108 (34): 13995–13998. Bibcode:2011PNAS..10813995C. doi:10.1073/pnas.1106493108 . PMC 3161613 . PMID 21836052.
Kwok, Sun; Zhang, Yong (26 octombrie 2011). „Mixed aromatic–aliphatic organic nanoparticles as carriers of unidentified infrared emission features”. Nature. 479 (7371): 80–3. Bibcode:2011Natur.479...80K. doi:10.1038/nature10542. PMID 22031328.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (septembrie 2012). „Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA” (PDF). The Astrophysical Journal Letters. 757 (1). L4. arXiv:1208.5498 . Bibcode:2012ApJ...757L...4J. doi:10.1088/2041-8205/757/1/L4.
Whitmire, Daniel P.; Wright, David P. (aprilie 1980). „Nuclear waste spectrum as evidence of technological extraterrestrial civilizations”. Icarus. 42 (1): 149–156. Bibcode:1980Icar...42..149W. doi:10.1016/0019-1035(80)90253-5.
Tenenbaum, P.; Jenkins, J. M.; Seader, S.; Burke, C. J.; Christiansen, J. L.; Rowe, J. F.; Caldwell, D. A.; Clarke, B. D.; Li, J.; Quintana, E. V.; Smith, J. C.; Thompson, S. E.; Twicken, J. D.; Borucki, W. J.; Batalha, N. M.; Cote, M. T.; Haas, M. R.; Hunter, R. C.; Sanderfer, D. T.; Girouard, F. R.; Hall, J. R.; Ibrahim, K.; Klaus, T. C.; McCauliff, S. D.; Middour, C. K.; Sabale, A.; Uddin, A. K.; Wohler, B.; Barclay, T.; Still, M. (2013). „Detection of Potential Transit Signals in the First 12 Quarters of Kepler Mission Data”. The Astrophysical Journal Supplement Series. 206 (1): 5. arXiv:1212.2915 . Bibcode:2013ApJS..206....5T. doi:10.1088/0067-0049/206/1/5.
Santerne, A.; Díaz, R. F.; Almenara, J.-M.; Lethuillier, A.; Deleuil, M.; Moutou, C. (2013). „Astrophysical false positives in exoplanet transit surveys: Why do we need bright stars?”. Sf2A-2013: Proceedings of the Annual Meeting of the French Society of Astronomy and Astrophysics: 555. arXiv:1310.2133 . Bibcode:2013sf2a.conf..555S.
Cassan, A.; et al. (11 ianuarie 2012). „One or more bound planets per Milky Way star from microlensing observations”. Nature. 481 (7380): 167–169. arXiv:1202.0903 . Bibcode:2012Natur.481..167C. doi:10.1038/nature10684. PMID 22237108.
Petigura, E. A.; Howard, A. W.; Marcy, G. W. (2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Strigari, L. E.; Barnabè, M.; Marshall, P. J.; Blandford, R. D. (2012). „Nomads of the Galaxy”. Monthly Notices of the Royal Astronomical Society. 423 (2): 1856–1865. arXiv:1201.2687 . Bibcode:2012MNRAS.423.1856S. doi:10.1111/j.1365-2966.2012.21009.x.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2013). „A young protoplanet candidate embedded in the circumstellar disk of HD 100546”. Astrophysical Journal. 766 (1). L1. arXiv:1302.7122 . Bibcode:2013ApJ...766L...1Q. doi:10.1088/2041-8205/766/1/l1.
Quanz, Sasch P.; Amara, Adam; Meyer, Michael P.; Kenworthy, Matthew P.; et al. (2014). „Confirmation and characterization of the protoplanet HD100546 b - Direct evidence for gas giant planet formation at 50 au”. Astrophysical Journal. 807 (1). 64. arXiv:1412.5173 . Bibcode:2015ApJ...807...64Q. doi:10.1088/0004-637X/807/1/64.
Burchell, M. J. (2006). „W(h)ither the Drake equation?”. International Journal of Astrobiology. 5 (3): 243–250. Bibcode:2006IJAsB...5..243B. doi:10.1017/S1473550406003107.
Marcy, G.; Butler, R.; Fischer, D.; et al. (2005). „Observed Properties of Exoplanets: Masses, Orbits and Metallicities”. Progress of Theoretical Physics Supplement. 158: 24–42. arXiv:astro-ph/0505003 . Bibcode:2005PThPS.158...24M. doi:10.1143/PTPS.158.24. Arhivat din original la 2 octombrie 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (ianuarie 2013). „Characterizing the Cool KOIs. IV. Kepler-32 as a Prototype for the Formation of Compact Planetary Systems throughout the Galaxy”. The Astrophysical Journal. 764 (1). 105. arXiv:1301.0023 . Bibcode:2013ApJ...764..105S. doi:10.1088/0004-637X/764/1/105.
Evans, J. E.; Maunder, E. W. (iunie 1903). „Experiments as to the actuality of the "Canals" observed on Mars”. Monthly Notices of the Royal Astronomical Society. 63 (8): 488–499. Bibcode:1903MNRAS..63..488E. doi:10.1093/mnras/63.8.488 .
Ailleris, Philippe (2011). „The lure of local SETI: Fifty years of field experiments”. Acta Astronautica. 68 (1–2): 2–15. Bibcode:2011AcAau..68....2A. doi:10.1016/j.actaastro.2009.12.011.
Ward, Peter; Brownlee, Donald (2000). Rare Earth: Why Complex Life is Uncommon in the Universe. Copernicus. Bibcode:2000rewc.book.....W. ISBN 978-0-387-98701-9.

cfa.harvard.edu

„Could Life Exist Deep Underground on Mars?”. Center for Astrophysics (Harvard & Smithsonian). Arhivat din original la 28 ianuarie 2021. Accesat în 28 ianuarie 2021.
Aguilar, David A.; Pulliam, Christine (25 februarie 2013). „Future Evidence for Extraterrestrial Life Might Come from Dying Stars”. Harvard-Smithsonian Center for Astrophysics. Release 2013-06. Accesat în 9 iunie 2017.

dash.harvard.edu

Summons, Roger E.; Amend, Jan P.; Bish, David; Buick, Roger; Cody, George D.; Des Marais, David J.; Dromart, Gilles; Eigenbrode, Jennifer L.; et al. (2011). „Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group” (PDF). Astrobiology. 11 (2): 157–81. Bibcode:2011AsBio..11..157S. doi:10.1089/ast.2010.0506. PMID 21417945. There is general consensus that extant microbial life on Mars would probably exist (if at all) in the subsurface and at low abundance.

news.harvard.edu

Reuell, Peter (8 iulie 2019). „Harvard study suggests asteroids might play key role in spreading life”. Harvard Gazette (în engleză). Accesat în 29 septembrie 2019.

hoyle.org.uk

Hoyle, Fred; Wickramasinghe, Chandra; Watson, John (1986). Viruses from Space and Related Matters (PDF). University College Cardiff Press. Bibcode:1986vfsr.book.....H. ISBN 978-0-906449-93-6. Arhivat din original (PDF) la 18 octombrie 2016. Accesat în 14 noiembrie 2021.

iap.fr

planet.iap.fr

„Discovery of OGLE 2005-BLG-390Lb, the first cool rocky/icy exoplanet”. IAP.fr. 25 ianuarie 2006.

instituteforpalebluedots.com

Glaser, Linda (27 ianuarie 2015). „Introducing: The Carl Sagan Institute”. Arhivat din original la 27 februarie 2015. Accesat în 11 mai 2015.
„Carl Sagan Institute – Research”. mai 2015. Accesat în 11 mai 2015.

ipap.jp

ptp.ipap.jp

Marcy, G.; Butler, R.; Fischer, D.; et al. (2005). „Observed Properties of Exoplanets: Masses, Orbits and Metallicities”. Progress of Theoretical Physics Supplement. 158: 24–42. arXiv:astro-ph/0505003 . Bibcode:2005PThPS.158...24M. doi:10.1143/PTPS.158.24. Arhivat din original la 2 octombrie 2008.

latimes.com

Khan, Amina (4 noiembrie 2013). „Milky Way may host billions of Earth-size planets”. Los Angeles Times. Accesat în 5 noiembrie 2013.

msoe.edu

people.msoe.edu

Tritt, Charles S. (2002). „Possibility of Life on Europa”. Milwaukee School of Engineering. Arhivat din original la 9 iunie 2007. Accesat în 10 august 2007.

nap.edu

National Research Council (2007). „6.2.2: Nonpolar Solvents”. The Limits of Organic Life in Planetary Systems. The National Academies Press. p. 74. doi:10.17226/11919. ISBN 978-0-309-10484-5.

nasa.gov

Dyches, Preston; Chou, Felcia (7 aprilie 2015). „The Solar System and Beyond is Awash in Water”. NASA. Arhivat din original la 10 aprilie 2015. Accesat în 8 aprilie 2015.
Loff, Sarah (1 februarie 2019). „The Apollo Missions”. nasa.gov. NASA. Accesat în 26 martie 2021.
Smith, Kimberly; Anderson, James (15 iulie 2019). „NASA Searches for Life from the Moon in Recently Rediscovered Historic Footage”. nasa.gov. NASA. Accesat în 26 martie 2021.
„NASA's Hubble Observations Suggest Underground Ocean on Jupiter's Largest Moon”. NASA News. 12 martie 2015. Accesat în 15 martie 2015.
Steigerwald, John (8 august 2011). „NASA Researchers: DNA Building Blocks Can Be Made in Space”. NASA. Arhivat din original la 23 iunie 2015. Accesat în 10 august 2011.
„NASA – Kepler”. Arhivat din original la 5 noiembrie 2013. Accesat în 4 noiembrie 2013.
Harrington, J. D.; Johnson, M. (4 noiembrie 2013). „NASA Kepler Results Usher in a New Era of Astronomy”.

jpl.nasa.gov

Dyches, Preston; Brown, Dwayne (12 mai 2015). „NASA Research Reveals Europa's Mystery Dark Material Could Be Sea Salt”. NASA. Accesat în 12 mai 2015.
Clavin, Whitney (1 mai 2014). „Ganymede May Harbor 'Club Sandwich' of Oceans and Ice”. NASA. Jet Propulsion Laboratory. Accesat în 1 mai 2014.
Cook, Jia-Rui C. (11 decembrie 2013). „Clay-Like Minerals Found on Icy Crust of Europa”. NASA. Accesat în 11 decembrie 2013.
„What is Consuming Hydrogen and Acetylene on Titan?”. NASA/JPL. 2010. Arhivat din original la 29 iunie 2011. Accesat în 6 iunie 2010.
Cofield, Calla; Chou, Felicia (25 iunie 2018). „NASA Asks: Will We Know Life When We See It?”. NASA. Accesat în 26 iunie 2018.
Webster, Guy (27 februarie 2014). „NASA Scientists Find Evidence of Water in Meteorite, Reviving Debate Over Life on Mars”. NASA. Accesat în 27 februarie 2014.

photojournal.jpl.nasa.gov

„PIA01141: Geologic 'Face on Mars' Formation”. NASA. 2 aprilie 1998. Accesat în 12 februarie 2011.

nai.nasa.gov

Hays, Lindsay, ed. (2015). „NASA Astrobiology Strategy 2015” (PDF). NASA. p. 65. Arhivat din original (PDF) la 22 decembrie 2016. Accesat în 12 octombrie 2017.

ntrs.nasa.gov

Orgel, L. E.; Crick, F. H. (ianuarie 1993). „Anticipating an RNA world. Some past speculations on the origin of life: Where are they today?”. FASEB Journal. 7 (1): 238–239. doi:10.1096/fasebj.7.1.7678564. PMID 7678564.

solarsystem.nasa.gov

„In Depth | Ceres”. NASA Solar System Exploration. Accesat în 29 ianuarie 2020.

saturn.jpl.nasa.gov

„Lakes on Titan, Full-Res: PIA08630”. 24 iulie 2006. Arhivat din original la 29 septembrie 2006.

nationalgeographic.com

„How many alien civilizations are out there? A new galactic survey holds a clue”. National Geographic. 2 noiembrie 2020.

news.nationalgeographic.com

Than, Ker (29 august 2012). „Sugar Found in Space”. National Geographic. Accesat în 31 august 2012.

nature.com

Green, James; et al. (27 octombrie 2021). „Call for a framework for reporting evidence for life beyond Earth”. Nature. 598: 575–579. doi:10.1038/s41586-021-03804-9. Accesat în 1 noiembrie 2021.
Lovett, Richard A. (31 mai 2011). „Enceladus named sweetest spot for alien life”. Nature. doi:10.1038/news.2011.337. Accesat în 3 iunie 2011.

nbcnews.com

Boyle, Alan (22 ianuarie 2014). „Is There Life on Ceres? Dwarf Planet Spews Water Vapor”. NBC. Accesat în 10 februarie 2015.

newscientist.com

Pickrell, John (4 septembrie 2006). „Top 10: Controversial pieces of evidence for extraterrestrial life”. New Scientist. Accesat în 18 februarie 2011.
Clark, Stuart (26 septembrie 2003). „Acidic clouds of Venus could harbour life”. New Scientist. Accesat în 30 decembrie 2015.
Wong, Sam (15 ianuarie 2019). „First moon plants sprout in China's Chang'e 4 biosphere experiment”. New Scientist. Accesat în 26 martie 2021.

nih.gov

ncbi.nlm.nih.gov

Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Petigura, Eric A.; Howard, Andrew W.; Marcy, Geoffrey W. (31 octombrie 2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences of the United States of America. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.
Pace, Norman R. (20 ianuarie 2001). „The universal nature of biochemistry”. Proceedings of the National Academy of Sciences of the United States of America. 98 (3): 805–808. Bibcode:2001PNAS...98..805P. doi:10.1073/pnas.98.3.805 . PMC 33372 . PMID 11158550.
Summons, Roger E.; Amend, Jan P.; Bish, David; Buick, Roger; Cody, George D.; Des Marais, David J.; Dromart, Gilles; Eigenbrode, Jennifer L.; et al. (2011). „Preservation of Martian Organic and Environmental Records: Final Report of the Mars Biosignature Working Group” (PDF). Astrobiology. 11 (2): 157–81. Bibcode:2011AsBio..11..157S. doi:10.1089/ast.2010.0506. PMID 21417945. There is general consensus that extant microbial life on Mars would probably exist (if at all) in the subsurface and at low abundance.
Thomson, William (august 1871). „The British Association Meeting at Edinburgh”. Nature. 4 (92): 261–278. Bibcode:1871Natur...4..261.. doi:10.1038/004261a0. PMC 2070380 . We must regard it as probably to the highest degree that there are countless seed-bearing meteoritic stones moving through space.
Demets, René (octombrie 2012). „Darwin's Contribution to the Development of the Panspermia Theory”. Astrobiology. 12 (10): 946–950. Bibcode:2012AsBio..12..946D. doi:10.1089/ast.2011.0790. PMID 23078643.
Orgel, L. E.; Crick, F. H. (ianuarie 1993). „Anticipating an RNA world. Some past speculations on the origin of life: Where are they today?”. FASEB Journal. 7 (1): 238–239. doi:10.1096/fasebj.7.1.7678564. PMID 7678564.
Livio, Mario (15 februarie 2017). „Winston Churchill's essay on alien life found”. Nature. 542 (7641): 289–291. Bibcode:2017Natur.542..289L. doi:10.1038/542289a . PMID 28202987.
Schulze-Makuch, Dirk; Crawford, Ian A. (2018). „Was There an Early Habitability Window for Earth's Moon?”. Astrobiology. 18 (8): 985–988. Bibcode:2018AsBio..18..985S. doi:10.1089/ast.2018.1844. PMC 6225594 . PMID 30035616.
Grotzinger, John P. (24 ianuarie 2014). „Introduction to Special Issue – Habitability, Taphonomy, and the Search for Organic Carbon on Mars”. Science. 343 (6169): 386–387. Bibcode:2014Sci...343..386G. doi:10.1126/science.1249944 . PMID 24458635.
Grotzinger, J. P.; et al. (24 ianuarie 2014). „A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars”. Science. 343 (6169): 1242777. Bibcode:2014Sci...343A.386G. CiteSeerX 10.1.1.455.3973 . doi:10.1126/science.1242777. PMID 24324272.
Küppers, M.; O'Rourke, L.; Bockelée-Morvan, D.; Zakharov, V.; Lee, S.; Von Allmen, P.; Carry, B.; Teyssier, D.; Marston, A.; Müller, T.; Crovisier, J.; Barucci, M. A.; Moreno, R. (23 ianuarie 2014). „Localized sources of water vapour on the dwarf planet (1) Ceres”. Nature. 505 (7484): 525–527. Bibcode:2014Natur.505..525K. doi:10.1038/nature12918. ISSN 0028-0836. PMID 24451541.
Campins, H.; Comfort, C. M. (23 ianuarie 2014). „Solar system: Evaporating asteroid”. Nature. 505 (7484): 487–488. Bibcode:2014Natur.505..487C. doi:10.1038/505487a . PMID 24451536.
Ponnamperuma, Cyril; Molton, Peter (ianuarie 1973). „The prospect of life on Jupiter”. Space Life Sciences. 4 (1): 32–44. Bibcode:1973SLSci...4...32P. doi:10.1007/BF02626340. PMID 4197410.
Irwin, Louis Neal; Schulze-Makuch, Dirk (iunie 2001). „Assessing the Plausibility of Life on Other Worlds”. Astrobiology. 1 (2): 143–160. Bibcode:2001AsBio...1..143I. doi:10.1089/153110701753198918. PMID 12467118.
Showman, Adam P.; Malhotra, Renu (1999). „The Galilean Satellites” (PDF). Science. 286 (5437): 77–84. doi:10.1126/science.286.5437.77. PMID 10506564. Arhivat din original (PDF) la 14 mai 2011. Accesat în 14 noiembrie 2021.
McKay, David S.; Gibson, Everett K., Jr.; Thomas-Keprta, Kathie L.; Vali, Hojatollah; Romanek, Christopher S.; et al. (august 1996). „Search for Past Life on Mars: Possible Relic Biogenic Activity in Martian Meteorite ALH84001”. Science. 273 (5277): 924–930. Bibcode:1996Sci...273..924M. doi:10.1126/science.273.5277.924. PMID 8688069.
Klein, Harold P.; Levin, Gilbert V.; Levin, Gilbert V.; Oyama, Vance I.; Lederberg, Joshua; Rich, Alexander; Hubbard, Jerry S.; Hobby, George L.; Straat, Patricia A.; Berdahl, Bonnie J.; Carle, Glenn C.; Brown, Frederick S.; Johnson, Richard D. (1 octombrie 1976). „The Viking Biological Investigation: Preliminary Results”. Science. 194 (4260): 99–105. Bibcode:1976Sci...194...99K. doi:10.1126/science.194.4260.99. PMID 17793090.
Beegle, Luther W.; Wilson, Michael G.; Abilleira, Fernando; Jordan, James F.; Wilson, Gregory R. (august 2007). „A Concept for NASA's Mars 2016 Astrobiology Field Laboratory”. Astrobiology. 7 (4): 545–577. Bibcode:2007AsBio...7..545B. doi:10.1089/ast.2007.0153. PMID 17723090.
Callahan, M.P.; Smith, K.E.; Cleaves, H.J.; Ruzica, J.; Stern, J.C.; Glavin, D.P.; House, C.H.; Dworkin, J.P. (11 august 2011). „Carbonaceous meteorites contain a wide range of extraterrestrial nucleobases”. Proceedings of the National Academy of Sciences. 108 (34): 13995–13998. Bibcode:2011PNAS..10813995C. doi:10.1073/pnas.1106493108 . PMC 3161613 . PMID 21836052.
Kwok, Sun; Zhang, Yong (26 octombrie 2011). „Mixed aromatic–aliphatic organic nanoparticles as carriers of unidentified infrared emission features”. Nature. 479 (7371): 80–3. Bibcode:2011Natur.479...80K. doi:10.1038/nature10542. PMID 22031328.
Cassan, A.; et al. (11 ianuarie 2012). „One or more bound planets per Milky Way star from microlensing observations”. Nature. 481 (7380): 167–169. arXiv:1202.0903 . Bibcode:2012Natur.481..167C. doi:10.1038/nature10684. PMID 22237108.
Petigura, E. A.; Howard, A. W.; Marcy, G. W. (2013). „Prevalence of Earth-size planets orbiting Sun-like stars”. Proceedings of the National Academy of Sciences. 110 (48): 19273–19278. arXiv:1311.6806 . Bibcode:2013PNAS..11019273P. doi:10.1073/pnas.1319909110 . PMC 3845182 . PMID 24191033.

nytimes.com

Davies, Paul (18 noiembrie 2013). „Are We Alone in the Universe?”. The New York Times. Accesat în 20 noiembrie 2013.
De Freytas-Tamura, Kimiko (15 februarie 2017). „Winston Churchill Wrote of Alien Life in a Lost Essay”. The New York Times. Accesat în 18 februarie 2017.
Dreifus, Claudia (2 decembrie 2014). „Much-Discussed Views That Go Way Back – Avi Loeb Ponders the Early Universe, Nature and Life”. The New York Times. Accesat în 3 decembrie 2014.
Overbye, Dennis (4 noiembrie 2013). „Far-Off Planets Like the Earth Dot the Galaxy”. The New York Times. Accesat în 5 noiembrie 2013.
Chang, Kenneth (9 decembrie 2013). „On Mars, an Ancient Lake and Perhaps Life”. The New York Times. Accesat în 9 decembrie 2013.
Chang, Kenneth (12 martie 2015). „Suddenly, It Seems, Water Is Everywhere in Solar System”. The New York Times. Accesat în 12 martie 2015.
Chang, Kenneth; Stirone, Shannon (8 februarie 2021). „Life on Venus? The Picture Gets Cloudier - Despite doubts from many scientists, a team of researchers who said they had detected an unusual gas in the planet's atmosphere were still confident of their findings”. The New York Times. Accesat în 8 februarie 2021.
Chang, Kenneth (24 august 2016). „One Star Over, a Planet That Might Be Another Earth”. The New York Times. Accesat în 4 septembrie 2016.
Overbye, Dennis (3 august 2015). „The Flip Side of Optimism About Life on Other Planets”. The New York Times. Accesat în 29 octombrie 2015.
Chang, Kenneth (17 aprilie 2014). „Scientists Find an 'Earth Twin', or Maybe a Cousin”. The New York Times.
Borenstein, Seth (13 februarie 2015). „Should We Call the Cosmos Seeking ET? Or Is That Risky?”. The New York Times. Associated Press. Arhivat din original la 14 februarie 2015.

ohiohistory.org

Wood, Lisa (3 iulie 2010). „WOW!”. Ohio History Connection Collections Blog. Accesat în 2 iulie 2016.

pbs.org

Aguirre, L. (1 iulie 2008). „The Drake Equation”. Nova ScienceNow. PBS. Accesat în 7 martie 2010.
„Alien Planets Revealed”. Nova. Sezonul 41. Episodul 10. 8 ianuarie 2014. Eveniment la 50:56.

positiveatheism.org

„Giordano Bruno: On the Infinite Universe and Worlds (De l'Infinito Universo et Mondi) Introductory Epistle: Argument of the Third Dialogue”. Arhivat din original la 13 octombrie 2014. Accesat în 14 noiembrie 2021.

psu.edu

citeseerx.ist.psu.edu

Loeb, Abraham (octombrie 2014). „The Habitable Epoch of the Early Universe”. International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613 . Bibcode:2014IJAsB..13..337L. CiteSeerX 10.1.1.748.4820 . doi:10.1017/S1473550414000196.
Grotzinger, J. P.; et al. (24 ianuarie 2014). „A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars”. Science. 343 (6169): 1242777. Bibcode:2014Sci...343A.386G. CiteSeerX 10.1.1.455.3973 . doi:10.1126/science.1242777. PMID 24324272.

rac.com.br

correio.rac.com.br

„'Da Terra à Lua', de Jules Verne, ediție bilingvă”. Arhivat din original la 31 mai 2014. Accesat în 14 noiembrie 2021.

researchgate.net

Hussmann, Hauke; Sohl, Frank; Spohn, Tilman (noiembrie 2006). „Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects”. Icarus. 185 (1): 258–273. Bibcode:2006Icar..185..258H. doi:10.1016/j.icarus.2006.06.005.

reuters.com

uk.reuters.com

„NASA probe reveals organics, ice on Mercury”. Reuters. 29 noiembrie 2012. Accesat în 29 noiembrie 2012.

sciencedaily.com

„DNA Building Blocks Can Be Made in Space, NASA Evidence Suggests”. ScienceDaily. 9 august 2011. Accesat în 9 august 2011.
„Astronomers Discover Complex Organic Matter Exists Throughout the Universe”. ScienceDaily. 26 octombrie 2011. Accesat în 27 octombrie 2011.

sciencemag.org

„Science – Special Collection – Curiosity Rover on Mars”. Science. 9 decembrie 2013. Accesat în 9 decembrie 2013.
„Special Issue – Table of Contents – Exploring Martian Habitability”. Science. 343 (6169): 345–452. 24 ianuarie 2014. Accesat în 24 ianuarie 2014.
„Special Collection – Curiosity – Exploring Martian Habitability”. Science. 24 ianuarie 2014. Accesat în 24 ianuarie 2014.
„Special Issue: Exoplanets”. Science. 3 mai 2013. Accesat în 18 mai 2013.

setileague.org

„Chapter 3 – Philosophy: "Solving the Drake Equation”. SETI League. decembrie 2002. Accesat în 24 iulie 2015.

skyandtelescope.com

Temming, M. (18 iulie 2014). „How many galaxies are there in the universe?”. Sky & Telescope. Accesat în 17 decembrie 2015.

skymania.com

Baldwin, Emily (26 aprilie 2012). „Lichen survives harsh Mars environment”. Skymania News. Arhivat din original la 28 mai 2012. Accesat în 27 aprilie 2012.

space.com

Moskowitz, Clara (29 martie 2012). „Life's Building Blocks May Have Formed in Dust Around Young Sun”. Space.com. Accesat în 30 martie 2012.
Choi, Charles Q. (21 martie 2011). „New Estimate for Alien Earths: 2 Billion in Our Galaxy Alone”. Space.com. Accesat în 24 aprilie 2011.
Redd, Nola Taylor (17 noiembrie 2012). „How Hot is Venus?”. Space.com (în engleză). Accesat în 28 ianuarie 2020.
Bortman, Henry (26 august 2004). „Was Venus Alive? 'The Signs are Probably There'”. Space.com. Accesat în 22 mai 2016.
Wall, Mike (5 martie 2014). „NASA hopes to launch ambitious mission to icy Jupiter moon”. Space.com. Accesat în 15 aprilie 2014.
Than, Ker (13 septembrie 2005). „Scientists Reconsider Habitability of Saturn's Moon”. Space.com.
Britt, Robert Roy (28 iulie 2006). „Lakes Found on Saturn's Moon Titan”. Space.com.
Gannon, Megan (28 februarie 2014). „Mars Meteorite with Odd 'Tunnels' & 'Spheres' Revives Debate Over Ancient Martian Life”. Space.com. Accesat în 28 februarie 2014.
Berger, Brian (16 februarie 2005). „Exclusive: NASA Researchers Claim Evidence of Present Life on Mars”. Space.com.
Chow, Dennis (22 iulie 2011). „NASA's Next Mars Rover to Land at Huge Gale Crater”. Space.com. Accesat în 22 iulie 2011.
Cofield, Calla (30 martie 2015). „Catalog of Earth Microbes Could Help Find Alien Life”. Space.com. Accesat în 11 mai 2015.
Chow, Denise (26 octombrie 2011). „Discovery: Cosmic Dust Contains Organic Matter from Stars”. Space.com. Accesat în 26 octombrie 2011.
Than, Ker (24 aprilie 2007). „Major Discovery: New Planet Could Harbor Water and Life”. Space.com.
Wall, Mike (4 aprilie 2012). „NASA Extends Planet-Hunting Kepler Mission Through 2016”. Space.com.
„100 Billion Alien Planets Fill Our Milky Way Galaxy: Study”. Space.com. 2 ianuarie 2013. Arhivat din original la 3 ianuarie 2013. Accesat în 10 martie 2016.

spaceflightnow.com

Clark, Stephen (14 martie 2014). „Economics, water plumes to drive Europa mission study”. Spaceflight Now. Accesat în 15 aprilie 2014.

spacetoday.net

„NASA denies Mars life reports”. spacetoday.net. 19 februarie 2005.

stanford.edu

solar-center.stanford.edu

„Who discovered that the Sun was a Star?”. Stanford Solar Center.

statepress.com

Weaver, Rheyanne. „Ruminations on other worlds”. State Press. Arhivat din original la 24 octombrie 2013. Accesat în 10 martie 2014.

the-scientist.com

Offord, Catherine (30 septembrie 2018). „Life Thrives Within the Earth's Crust”. The Scientist Magazine (în engleză). Accesat în 2 aprilie 2019.
Wilke, Carolyn (11 decembrie 2018). „Life Deep Underground Is Twice the Volume of the Oceans: Study”. The Scientist Magazine (în engleză). Accesat în 2 aprilie 2019.

ucr.edu

ucrtoday.ucr.edu

Nightingale, Sarah (25 iunie 2018). „UCR Team Among Scientists Developing Guidebook for Finding Life Beyond Earth”. UCR Today. University of California, Riverside. Accesat în 26 iunie 2018.

universetoday.com

Atkinson, Nancy (24 iunie 2010). „Was Venus once a waterworld?”. Universe Today. Accesat în 22 mai 2016.
O'Neill, Ian (5 martie 2009). „Life on Ceres: Could the Dwarf Planet be the Root of Panspermia”. Universe Today. Accesat în 30 ianuarie 2012.
Atkinson, Nancy (2009). „Europa Capable of Supporting Life, Scientist Says”. Universe Today. Accesat în 18 august 2011.

upr.edu

phl.upr.edu

„My God, it's full of planets! They should have sent a poet” (Press release). Planetary Habitability Laboratory, University of Puerto Rico at Arecibo. 3 ianuarie 2012. Arhivat din original la 25 iulie 2015. Accesat în 14 noiembrie 2021.

usda.gov

naldc.nal.usda.gov

Nielsen, Forrest H. (1999). „Ultratrace Minerals”. În Shils, Maurice E.; Shike, Moshe. Modern Nutrition in Health and Disease (ed. 9th). Williams & Wilkins. pp. 283–303. ISBN 978-0-683-30769-6. Arhivat din original la 18 octombrie 2016. Accesat în 14 noiembrie 2021.

usra.edu

lpi.usra.edu

Rampelotto, P. H. (aprilie 2010). Panspermia: A Promising Field of Research (PDF). Astrobiology Science Conference 2010: Evolution and Life: Surviving Catastrophes and Extremes on Earth and Beyond. 20–26 April 2010. League City, Texas. Bibcode:2010LPICo1538.5224R.

utep.edu

geo.utep.edu

Schulze-Makuch, Dirk; Irwin, Louis N. (2001). „Alternative Energy Sources Could Support Life on Europa” (PDF). Departments of Geological and Biological Sciences, University of Texas at El Paso. Arhivat din original (PDF) la 3 iulie 2006. Accesat în 21 decembrie 2007.

utexas.edu

jsg.utexas.edu

„Scientists Find Evidence for "Great Lake" on Europa and Potential New Habitat for Life”. The University of Texas at Austin. 16 noiembrie 2011.

uvic.ca

orca.phys.uvic.ca

Hsiao, Eric (2004). „Possibility of Life on Europa” (PDF). University of Victoria.

washingtonpost.com

Frank, Adam (31 decembrie 2020). „A new frontier is opening in the search for extraterrestrial life - The reason we haven't found life elsewhere in the universe is simple: We haven't really looked until now”. The Washington Post. Accesat în 1 ianuarie 2021.

web.archive.org

Weaver, Rheyanne. „Ruminations on other worlds”. State Press. Arhivat din original la 24 octombrie 2013. Accesat în 10 martie 2014.
Nielsen, Forrest H. (1999). „Ultratrace Minerals”. În Shils, Maurice E.; Shike, Moshe. Modern Nutrition in Health and Disease (ed. 9th). Williams & Wilkins. pp. 283–303. ISBN 978-0-683-30769-6. Arhivat din original la 18 octombrie 2016. Accesat în 14 noiembrie 2021.
Dyches, Preston; Chou, Felcia (7 aprilie 2015). „The Solar System and Beyond is Awash in Water”. NASA. Arhivat din original la 10 aprilie 2015. Accesat în 8 aprilie 2015.
Hays, Lindsay, ed. (2015). „NASA Astrobiology Strategy 2015” (PDF). NASA. p. 65. Arhivat din original (PDF) la 22 decembrie 2016. Accesat în 12 octombrie 2017.
„Habitability and Biology: What are the Properties of Life?”. Phoenix Mars Mission. The University of Arizona. Arhivat din original la 2 octombrie 2013. Accesat în 6 iunie 2013. If any life exists on Mars today, scientists believe it is most likely to be in pockets of liquid water beneath the Martian surface.
Tritt, Charles S. (2002). „Possibility of Life on Europa”. Milwaukee School of Engineering. Arhivat din original la 9 iunie 2007. Accesat în 10 august 2007.
Schulze-Makuch, Dirk; Irwin, Louis N. (2001). „Alternative Energy Sources Could Support Life on Europa” (PDF). Departments of Geological and Biological Sciences, University of Texas at El Paso. Arhivat din original (PDF) la 3 iulie 2006. Accesat în 21 decembrie 2007.
Hoyle, Fred; Wickramasinghe, Chandra; Watson, John (1986). Viruses from Space and Related Matters (PDF). University College Cardiff Press. Bibcode:1986vfsr.book.....H. ISBN 978-0-906449-93-6. Arhivat din original (PDF) la 18 octombrie 2016. Accesat în 14 noiembrie 2021.
„Did the Early Venus Harbor Life? (Weekend Feature)”. The Daily Galaxy. 2 iunie 2012. Arhivat din original la 28 octombrie 2017. Accesat în 22 mai 2016.
„Could Life Exist Deep Underground on Mars?”. Center for Astrophysics (Harvard & Smithsonian). Arhivat din original la 28 ianuarie 2021. Accesat în 28 ianuarie 2021.
„Top 10 Places To Find Alien Life : Discovery News”. News.discovery.com. 8 iunie 2010. Arhivat din original la 22 octombrie 2012. Accesat în 13 iunie 2012.
Baldwin, Emily (26 aprilie 2012). „Lichen survives harsh Mars environment”. Skymania News. Arhivat din original la 28 mai 2012. Accesat în 27 aprilie 2012.
de Vera, J.-P.; Kohler, Ulrich (26 aprilie 2012). „The adaptation potential of extremophiles to Martian surface conditions and its implication for the habitability of Mars” (PDF). European Geosciences Union. Arhivat din original (PDF) la 4 mai 2012. Accesat în 27 aprilie 2012.
Showman, Adam P.; Malhotra, Renu (1999). „The Galilean Satellites” (PDF). Science. 286 (5437): 77–84. doi:10.1126/science.286.5437.77. PMID 10506564. Arhivat din original (PDF) la 14 mai 2011. Accesat în 14 noiembrie 2021.
Plait, Phil (17 noiembrie 2011). „Huge lakes of water may exist under Europa's ice”. Discover. Bad Astronomy Blog. Arhivat din original la 9 aprilie 2012. Accesat în 14 noiembrie 2021.
„Lakes on Titan, Full-Res: PIA08630”. 24 iulie 2006. Arhivat din original la 29 septembrie 2006.
„What is Consuming Hydrogen and Acetylene on Titan?”. NASA/JPL. 2010. Arhivat din original la 29 iunie 2011. Accesat în 6 iunie 2010.
Crenson, Matt (6 august 2006). „Experts: Little Evidence of Life on Mars”. Associated Press. Arhivat din original la 16 aprilie 2011. Accesat în 8 martie 2011.
Glaser, Linda (27 ianuarie 2015). „Introducing: The Carl Sagan Institute”. Arhivat din original la 27 februarie 2015. Accesat în 11 mai 2015.
Steigerwald, John (8 august 2011). „NASA Researchers: DNA Building Blocks Can Be Made in Space”. NASA. Arhivat din original la 23 iunie 2015. Accesat în 10 august 2011.
Moldwin, Mark (noiembrie 2004). „Why SETI is science and UFOlogy is not”. Skeptical Inquirer. Arhivat din original la 13 martie 2009.
„NASA – Kepler”. Arhivat din original la 5 noiembrie 2013. Accesat în 4 noiembrie 2013.
„My God, it's full of planets! They should have sent a poet” (Press release). Planetary Habitability Laboratory, University of Puerto Rico at Arecibo. 3 ianuarie 2012. Arhivat din original la 25 iulie 2015. Accesat în 14 noiembrie 2021.
Marcy, G.; Butler, R.; Fischer, D.; et al. (2005). „Observed Properties of Exoplanets: Masses, Orbits and Metallicities”. Progress of Theoretical Physics Supplement. 158: 24–42. arXiv:astro-ph/0505003 . Bibcode:2005PThPS.158...24M. doi:10.1143/PTPS.158.24. Arhivat din original la 2 octombrie 2008.
„100 Billion Alien Planets Fill Our Milky Way Galaxy: Study”. Space.com. 2 ianuarie 2013. Arhivat din original la 3 ianuarie 2013. Accesat în 10 martie 2016.
Wiker, Benjamin D. (4 noiembrie 2002). „Alien Ideas: Christianity and the Search for Extraterrestrial Life”. Crisis Magazine. Arhivat din original la 10 februarie 2003.
„Giordano Bruno: On the Infinite Universe and Worlds (De l'Infinito Universo et Mondi) Introductory Epistle: Argument of the Third Dialogue”. Arhivat din original la 13 octombrie 2014. Accesat în 14 noiembrie 2021.
„'Da Terra à Lua', de Jules Verne, ediție bilingvă”. Arhivat din original la 31 mai 2014. Accesat în 14 noiembrie 2021.
Borenstein, Seth (13 februarie 2015). „Should We Call the Cosmos Seeking ET? Or Is That Risky?”. The New York Times. Associated Press. Arhivat din original la 14 februarie 2015.

wku.edu

people.wku.edu

Wallace, Alfred Russel (1907). Is Mars Habitable? A Critical Examination of Professor Lowell's Book "Mars and Its Canals," With an Alternative Explanation. London: Macmillan. OCLC 8257449.

worldcat.org

Arrhenius, Svante (martie 1908). Worlds in the Making: The Evolution of the Universe. trans. H. Borns. Harper & Brothers. OCLC 1935295.
Küppers, M.; O'Rourke, L.; Bockelée-Morvan, D.; Zakharov, V.; Lee, S.; Von Allmen, P.; Carry, B.; Teyssier, D.; Marston, A.; Müller, T.; Crovisier, J.; Barucci, M. A.; Moreno, R. (23 ianuarie 2014). „Localized sources of water vapour on the dwarf planet (1) Ceres”. Nature. 505 (7484): 525–527. Bibcode:2014Natur.505..525K. doi:10.1038/nature12918. ISSN 0028-0836. PMID 24451541.
Wallace, Alfred Russel (1907). Is Mars Habitable? A Critical Examination of Professor Lowell's Book "Mars and Its Canals," With an Alternative Explanation. London: Macmillan. OCLC 8257449.

wsu.edu

news.wsu.edu

„Mysteries from the moon's past”. Washington State University. 23 iulie 2018. Accesat în 22 august 2020.

youtube.com

„Video (00:51) – Jupiter's 'Club Sandwich' Moon”. NASA. 1 mai 2014. Arhivat din original la 28 octombrie 2021. Accesat în 2 mai 2014.

zenodo.org

Kargel, Jeffrey S.; Kaye, Jonathan Z.; Head, James W.; Marion, Giles M.; Sassen, Roger; et al. (noiembrie 2000). „Europa's Crust and Ocean: Origin, Composition, and the Prospects for Life”. Icarus. 148 (1): 226–265. Bibcode:2000Icar..148..226K. doi:10.1006/icar.2000.6471.
McKay, C. P.; Smith, H. D. (2005). „Possibilities for methanogenic life in liquid methane on the surface of Titan”. Icarus. 178 (1): 274–276. Bibcode:2005Icar..178..274M. doi:10.1016/j.icarus.2005.05.018.
Evans, J. E.; Maunder, E. W. (iunie 1903). „Experiments as to the actuality of the "Canals" observed on Mars”. Monthly Notices of the Royal Astronomical Society. 63 (8): 488–499. Bibcode:1903MNRAS..63..488E. doi:10.1093/mnras/63.8.488 .