Extraterrestrial life (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Extraterrestrial life" in English language version.

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43doi.org

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antarcticaedu.com (Global: low place; English: low place)

"LECTURE 4: MODERN THOUGHTS ON EXTRATERRESTRIAL LIFE". The University of Antarctica. Retrieved 25 July 2015.

archive.org (Global: 6^th place; English: 6^th place)

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.
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.
Arrhenius, Svante (March 1908). Worlds in the Making: The Evolution of the Universe. trans. H. Borns. Harper & Brothers. OCLC 1935295.

archive.today (Global: 14^th place; English: 14^th place)

Green, Jaime (5 December 2023). "What Is Life? - The answer matters in space exploration. But we still don't really know". The Atlantic. Archived from the original on 5 December 2023. Retrieved 15 December 2023.
Chang, Kenneth (14 December 2023). "Poison Gas Hints at Potential for Life on an Ocean Moon of Saturn - A researcher who has studied the icy world said "the prospects for the development of life are getting better and better on Enceladus."". The New York Times. Archived from the original on 14 December 2023. Retrieved 15 December 2023.
Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.

archives-ouvertes.fr (Global: 1,031^st place; English: 879^th place)

hal-insu.archives-ouvertes.fr

Marcq, Emmanuel; Mills, Franklin P.; Parkinson, Christopher D.; Vandaele, Ann Carine (30 November 2017). "Composition and Chemistry of the Neutral Atmosphere of Venus" (PDF). Space Science Reviews. 214 (1): 10. doi:10.1007/s11214-017-0438-5. ISSN 1572-9672. S2CID 255067610.

arxiv.org (Global: 69^th place; English: 59^th place)

Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (June 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. ISSN 0094-5765. S2CID 16889489.
Loeb, Abraham (October 2014). "The Habitable Epoch of the Early Universe" (PDF). International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613. Bibcode:2014IJAsB..13..337L. doi:10.1017/S1473550414000196. S2CID 2777386. Retrieved 15 December 2014.
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. S2CID 16349463. Archived from the original on 2 October 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (January 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. S2CID 43750666.
Wang, Zhi-Wei; Braunstein, Samuel L. (2023). "Sciama's argument on life in a random universe and distinguishing apples from oranges". Nature Astronomy. 7 (2023): 755–756. arXiv:2109.10241. Bibcode:2023NatAs...7..755W. doi:10.1038/s41550-023-02014-9.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (June 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. S2CID 118481496.
Zahnle, Kevin J.; Lupu, Roxana; Catling, David C.; Wogan, Nick (1 June 2020). "Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth". The Planetary Science Journal. 1 (1): 11. arXiv:2001.00095. Bibcode:2020PSJ.....1...11Z. doi:10.3847/PSJ/ab7e2c. ISSN 2632-3338.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (September 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. S2CID 14205612.
Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.
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. S2CID 250885680.
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 January 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. S2CID 2614136.
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. S2CID 119185094. estimates 700 objects >10⁻⁶ solar masses (roughly the mass of Mars) per main-sequence star between 0.08 and 1 Solar mass, of which there are billions in the Milky Way.
Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, Eduardo L.; Queloz, D.; Mayor, M.; Udry, S. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". Astronomy & Astrophysics. 556: 133. arXiv:1306.3225. Bibcode:2013A&A...556A.133S. doi:10.1051/0004-6361/201321871. S2CID 119193690.

bbc.co.uk (Global: 8^th place; English: 10^th place)

bbc.co.uk

Amos, Jonathan (22 July 2011). "Mars rover aims for deep crater". BBC News. Retrieved 22 July 2011.

news.bbc.co.uk

"Hawking warns over alien beings". BBC News. 25 April 2010. Retrieved 2 May 2010.

bbc.com (Global: 20^th place; English: 30^th place)

Ghosh, Pallab (12 February 2015). "Scientists in US are urged to seek contact with aliens". BBC News.
Ghosh, Pallab (12 February 2015). "Scientist: 'Try to contact aliens'". BBC News. Retrieved 12 February 2015.
Bockman, Chris (4 November 2014). "Why the French state has a team of UFO hunters". BBC News.
Zaria Gorvett (22 October 2023). "The weird aliens of early science fiction". BBC. Retrieved 25 January 2024.

berkeley.edu (Global: 580^th place; English: 462^nd place)

newscenter.berkeley.edu

Sanders, R. (4 November 2013). "Astronomers answer key question: How common are habitable planets?". newscenter.berkeley.edu. Archived from the original on 7 November 2014. Retrieved 25 July 2015.

setiathome.berkeley.edu

"Regarding Messaging To Extraterrestrial Intelligence (METI) / Active Searches For Extraterrestrial Intelligence (Active SETI)". University of California, Berkeley. 13 February 2015. Retrieved 14 February 2015.

books.google.com (Global: 3^rd place; English: 3^rd place)

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.
Steiger, Brad; White, John, eds. (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.
Crowe, Michael J. (1999). The Extraterrestrial Life Debate, 1750–1900. Courier Dover Publications. ISBN 978-0-486-40675-6.
Gabrovsky, A.N. (2016). Chaucer the Alchemist: Physics, Mutability, and the Medieval Imagination. The New Middle Ages. Palgrave Macmillan US. p. 83. ISBN 978-1-137-52391-4. Retrieved 14 May 2023.
J. William Schopf (2002). Life's Origin: The Beginnings of Biological Evolution. University of California Press. ISBN 9780520233911. Retrieved 6 August 2022.

britannica.com (Global: 40^th place; English: 58^th place)

"Atmosphere - Planets, Composition, Pressure | Britannica". www.britannica.com. Retrieved 17 April 2024.

caltech.edu (Global: 887^th place; English: 714^th place)

exoplanetarchive.ipac.caltech.edu

"DENIS-P J082303.1-491201 b". Caltech. Retrieved 8 March 2014.

cambridge.org (Global: 305^th place; English: 264^th place)

Drake, Frank (July 2013). "Reflections on the Equation". International Journal of Astrobiology. 12 (3): 173–176. doi:10.1017/S1473550413000207. ISSN 1473-5504.

coseti.org (Global: low place; English: low place)

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

crisismagazine.com (Global: low place; English: low place)

Wiker, Benjamin D. (4 November 2002). "Alien Ideas: Christianity and the Search for Extraterrestrial Life". Crisis Magazine. Archived from the original on 10 February 2003.

discovery.com (Global: 1,299^th place; English: 903^rd place)

dsc.discovery.com

Crenson, Matt (6 August 2006). "Experts: Little Evidence of Life on Mars". Associated Press. Archived from the original on 16 April 2011. Retrieved 8 March 2011.

doi.org (Global: 2^nd place; English: 2^nd place)

Catling, D.C. (2015), "Planetary Atmospheres", Treatise on Geophysics, Elsevier, pp. 429–472, Bibcode:2015trge.book..429C, doi:10.1016/b978-0-444-53802-4.00185-8, ISBN 978-0-444-53803-1, retrieved 17 April 2024
Shibuya, Takazo; Takai, Ken (16 November 2022). "Liquid and supercritical CO2 as an organic solvent in Hadean seafloor hydrothermal systems: implications for prebiotic chemical evolution". Progress in Earth and Planetary Science. 9 (1) 60. doi:10.1186/s40645-022-00510-6. ISSN 2197-4284.
Damer, Bruce; Deamer, David (1 April 2020). "The Hot Spring Hypothesis for an Origin of Life". Astrobiology. 20 (4): 429–452. Bibcode:2020AsBio..20..429D. doi:10.1089/ast.2019.2045. ISSN 1531-1074. PMC 7133448. PMID 31841362.
Mapelli, Francesca; Marasco, Ramona; Rolli, Eleonora; Daffonchio, Daniele; Donachie, Stuart; Borin, Sara (2015), Rouwet, Dmitri; Christenson, Bruce; Tassi, Franco; Vandemeulebrouck, Jean (eds.), "Microbial Life in Volcanic Lakes", Volcanic Lakes, Berlin, Heidelberg: Springer Berlin Heidelberg, pp. 507–522, doi:10.1007/978-3-642-36833-2_23, hdl:2434/266460, ISBN 978-3-642-36832-5, retrieved 17 April 2024
Marion, Giles M.; Fritsen, Christian H.; Eicken, Hajo; Payne, Meredith C. (1 December 2003). "The search for life on Europa: Limiting environmental factors, potential habitats, and Earth analogues". Astrobiology. 3 (4): 785–811. Bibcode:2003AsBio...3..785M. doi:10.1089/153110703322736105. ISSN 1531-1074. PMID 14987483.
Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.
Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (June 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. ISSN 0094-5765. S2CID 16889489.
Loeb, Abraham (October 2014). "The Habitable Epoch of the Early Universe" (PDF). International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613. Bibcode:2014IJAsB..13..337L. doi:10.1017/S1473550414000196. S2CID 2777386. Retrieved 15 December 2014.
Drake, Frank (July 2013). "Reflections on the Equation". International Journal of Astrobiology. 12 (3): 173–176. doi:10.1017/S1473550413000207. ISSN 1473-5504.
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. S2CID 121060763.
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. S2CID 16349463. Archived from the original on 2 October 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (January 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. S2CID 43750666.
Wang, Zhi-Wei; Braunstein, Samuel L. (2023). "Sciama's argument on life in a random universe and distinguishing apples from oranges". Nature Astronomy. 7 (2023): 755–756. arXiv:2109.10241. Bibcode:2023NatAs...7..755W. doi:10.1038/s41550-023-02014-9.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (June 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. S2CID 118481496.
Pace, Norman R. (20 January 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. Bibcode:2007nap..book11919N. doi:10.17226/11919. ISBN 978-0-309-10484-5.
Stevenson, David S.; Large, Sean (25 October 2017). "Evolutionary exobiology: Towards the qualitative assessment of biological potential on exoplanets". International Journal of Astrobiology. 18 (3): 204–208. doi:10.1017/S1473550417000349. S2CID 125275411.
Amils, Ricardo; González-Toril, Elena; Fernández-Remolar, David; Gómez, Felipe; Aguilera, Ángeles; Rodríguez, Nuria; Malki, Mustafá; García-Moyano, Antonio; Fairén, Alberto G.; de la Fuente, Vicenta; Luis Sanz, José (February 2007). "Extreme environments as Mars terrestrial analogs: The Rio Tinto case". Planetary and Space Science. 55 (3): 370–381. Bibcode:2007P&SS...55..370A. doi:10.1016/j.pss.2006.02.006.
Daniel, Isabelle; Oger, Philippe; Winter, Roland (2006). "Origins of life and biochemistry under high-pressure conditions". Chemical Society Reviews. 35 (10): 858–875. doi:10.1039/b517766a. ISSN 0306-0012. PMID 17003893.
Dong, Hailiang; Yu, Bingsong (1 September 2007). "Geomicrobiological processes in extreme environments: A review". Episodes. 30 (3): 202–216. doi:10.18814/epiiugs/2007/v30i3/003. ISSN 0705-3797.
Georgieva, Magdalena N.; Little, Crispin T.S.; Maslennikov, Valeriy V.; Glover, Adrian G.; Ayupova, Nuriya R.; Herrington, Richard J. (June 2021). "The history of life at hydrothermal vents". Earth-Science Reviews. 217 103602. Bibcode:2021ESRv..21703602G. doi:10.1016/j.earscirev.2021.103602.
Zahnle, Kevin J.; Lupu, Roxana; Catling, David C.; Wogan, Nick (1 June 2020). "Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth". The Planetary Science Journal. 1 (1): 11. arXiv:2001.00095. Bibcode:2020PSJ.....1...11Z. doi:10.3847/PSJ/ab7e2c. ISSN 2632-3338.
Atreya, S.K; Mahaffy, P.R; Niemann, H.B; Wong, M.H; Owen, T.C (February 2003). "Composition and origin of the atmosphere of Jupiter—an update, and implications for the extrasolar giant planets". Planetary and Space Science. 51 (2): 105–112. Bibcode:2003P&SS...51..105A. doi:10.1016/S0032-0633(02)00144-7.
Marcq, Emmanuel; Mills, Franklin P.; Parkinson, Christopher D.; Vandaele, Ann Carine (30 November 2017). "Composition and Chemistry of the Neutral Atmosphere of Venus" (PDF). Space Science Reviews. 214 (1): 10. doi:10.1007/s11214-017-0438-5. ISSN 1572-9672. S2CID 255067610.
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. S2CID 40690489.
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 October 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. S2CID 24957458.
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 October 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. S2CID 4419859.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (September 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. S2CID 14205612.
Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.
Whitmire, Daniel P.; Wright, David P. (April 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. S2CID 250885680.
Cassan, A.; et al. (11 January 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. S2CID 2614136.
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. S2CID 119185094. estimates 700 objects >10⁻⁶ solar masses (roughly the mass of Mars) per main-sequence star between 0.08 and 1 Solar mass, of which there are billions in the Milky Way.
Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, Eduardo L.; Queloz, D.; Mayor, M.; Udry, S. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". Astronomy & Astrophysics. 556: 133. arXiv:1306.3225. Bibcode:2013A&A...556A.133S. doi:10.1051/0004-6361/201321871. S2CID 119193690.
Evans, J. E.; Maunder, E. W. (June 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.
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 (October 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.
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. S2CID 144197172.
Ailleris, Philippe (January–February 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.
Beck, Lewis White (1971). "Extraterrestrial Intelligent Life". Proceedings and Addresses of the American Philosophical Association. 45: 5–21. doi:10.2307/3129745. JSTOR 3129745.

earthsky.org (Global: 6,724^th place; English: 5,463^rd place)

"Did the Wow! signal come from this star? | Space | EarthSky". earthsky.org. 2 December 2020. Retrieved 10 May 2024.

elsevier.com (Global: 610^th place; English: 704^th place)

linkinghub.elsevier.com

Catling, D.C. (2015), "Planetary Atmospheres", Treatise on Geophysics, Elsevier, pp. 429–472, Bibcode:2015trge.book..429C, doi:10.1016/b978-0-444-53802-4.00185-8, ISBN 978-0-444-53803-1, retrieved 17 April 2024
Amils, Ricardo; González-Toril, Elena; Fernández-Remolar, David; Gómez, Felipe; Aguilera, Ángeles; Rodríguez, Nuria; Malki, Mustafá; García-Moyano, Antonio; Fairén, Alberto G.; de la Fuente, Vicenta; Luis Sanz, José (February 2007). "Extreme environments as Mars terrestrial analogs: The Rio Tinto case". Planetary and Space Science. 55 (3): 370–381. Bibcode:2007P&SS...55..370A. doi:10.1016/j.pss.2006.02.006.
Atreya, S.K; Mahaffy, P.R; Niemann, H.B; Wong, M.H; Owen, T.C (February 2003). "Composition and origin of the atmosphere of Jupiter—an update, and implications for the extrasolar giant planets". Planetary and Space Science. 51 (2): 105–112. Bibcode:2003P&SS...51..105A. doi:10.1016/S0032-0633(02)00144-7.

esa.int (Global: 1,482^nd place; English: 1,468^th place)

"ExoMars rover". ESA. Archived from the original on 19 October 2012. Retrieved 14 April 2014.

eso.org (Global: 3,034^th place; English: 2,650^th place)

Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (September 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. S2CID 14205612.

excite.com (Global: low place; English: 9,059^th place)

apnews.excite.com

Katz, Gregory (20 July 2015). "Searching for ET: Hawking to look for extraterrestrial life". Excite!. Associated Press. Retrieved 20 July 2015.

exeter.ac.uk (Global: 6,124^th place; English: 3,763^rd place)

ore.exeter.ac.uk

Parkyn, Joel L. (April 2019). "The Devine Pedagogy: Theological Explorations of Intelligent Extraterrestrial Life" (PDF). ore.exeter.ac.uk. Retrieved 10 May 2024.

exoplanet.eu (Global: 9,995^th place; English: low place)

Schneider, Jean (10 September 2011). "Interactive Extra-solar Planets Catalog". Extrasolar Planets Encyclopaedia. Retrieved 30 January 2012.

ghostarchive.org (Global: 32^nd place; English: 21^st place)

Davies, Paul (18 November 2013). "Are We Alone in the Universe?". The New York Times. Archived from the original on 1 January 2022. Retrieved 20 November 2013.
Overbye, Denni (6 January 2015). "So Many Earth-Like Planets, So Few Telescopes". The New York Times. Archived from the original on 1 January 2022. Retrieved 6 January 2015.
Overbye, Dennis (3 August 2015). "The Flip Side of Optimism About Life on Other Planets". The New York Times. Archived from the original on 1 January 2022. Retrieved 29 October 2015.
Chang, Kenneth (24 August 2016). "One Star Over, a Planet That Might Be Another Earth". The New York Times. Archived from the original on 1 January 2022. Retrieved 4 September 2016.

handle.net (Global: 102^nd place; English: 76^th place)

hdl.handle.net

Mapelli, Francesca; Marasco, Ramona; Rolli, Eleonora; Daffonchio, Daniele; Donachie, Stuart; Borin, Sara (2015), Rouwet, Dmitri; Christenson, Bruce; Tassi, Franco; Vandemeulebrouck, Jean (eds.), "Microbial Life in Volcanic Lakes", Volcanic Lakes, Berlin, Heidelberg: Springer Berlin Heidelberg, pp. 507–522, doi:10.1007/978-3-642-36833-2_23, hdl:2434/266460, ISBN 978-3-642-36832-5, retrieved 17 April 2024
Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Catling, D.C. (2015), "Planetary Atmospheres", Treatise on Geophysics, Elsevier, pp. 429–472, Bibcode:2015trge.book..429C, doi:10.1016/b978-0-444-53802-4.00185-8, ISBN 978-0-444-53803-1, retrieved 17 April 2024
Damer, Bruce; Deamer, David (1 April 2020). "The Hot Spring Hypothesis for an Origin of Life". Astrobiology. 20 (4): 429–452. Bibcode:2020AsBio..20..429D. doi:10.1089/ast.2019.2045. ISSN 1531-1074. PMC 7133448. PMID 31841362.
Marion, Giles M.; Fritsen, Christian H.; Eicken, Hajo; Payne, Meredith C. (1 December 2003). "The search for life on Europa: Limiting environmental factors, potential habitats, and Earth analogues". Astrobiology. 3 (4): 785–811. Bibcode:2003AsBio...3..785M. doi:10.1089/153110703322736105. ISSN 1531-1074. PMID 14987483.
Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.
Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (June 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. ISSN 0094-5765. S2CID 16889489.
Rampelotto, P. H. (April 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.
Loeb, Abraham (October 2014). "The Habitable Epoch of the Early Universe" (PDF). International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613. Bibcode:2014IJAsB..13..337L. doi:10.1017/S1473550414000196. S2CID 2777386. Retrieved 15 December 2014.
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. S2CID 121060763.
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. S2CID 16349463. Archived from the original on 2 October 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (January 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. S2CID 43750666.
Wang, Zhi-Wei; Braunstein, Samuel L. (2023). "Sciama's argument on life in a random universe and distinguishing apples from oranges". Nature Astronomy. 7 (2023): 755–756. arXiv:2109.10241. Bibcode:2023NatAs...7..755W. doi:10.1038/s41550-023-02014-9.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (June 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. S2CID 118481496.
Pace, Norman R. (20 January 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. Bibcode:2007nap..book11919N. doi:10.17226/11919. ISBN 978-0-309-10484-5.
Amils, Ricardo; González-Toril, Elena; Fernández-Remolar, David; Gómez, Felipe; Aguilera, Ángeles; Rodríguez, Nuria; Malki, Mustafá; García-Moyano, Antonio; Fairén, Alberto G.; de la Fuente, Vicenta; Luis Sanz, José (February 2007). "Extreme environments as Mars terrestrial analogs: The Rio Tinto case". Planetary and Space Science. 55 (3): 370–381. Bibcode:2007P&SS...55..370A. doi:10.1016/j.pss.2006.02.006.
Georgieva, Magdalena N.; Little, Crispin T.S.; Maslennikov, Valeriy V.; Glover, Adrian G.; Ayupova, Nuriya R.; Herrington, Richard J. (June 2021). "The history of life at hydrothermal vents". Earth-Science Reviews. 217 103602. Bibcode:2021ESRv..21703602G. doi:10.1016/j.earscirev.2021.103602.
Zahnle, Kevin J.; Lupu, Roxana; Catling, David C.; Wogan, Nick (1 June 2020). "Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth". The Planetary Science Journal. 1 (1): 11. arXiv:2001.00095. Bibcode:2020PSJ.....1...11Z. doi:10.3847/PSJ/ab7e2c. ISSN 2632-3338.
Atreya, S.K; Mahaffy, P.R; Niemann, H.B; Wong, M.H; Owen, T.C (February 2003). "Composition and origin of the atmosphere of Jupiter—an update, and implications for the extrasolar giant planets". Planetary and Space Science. 51 (2): 105–112. Bibcode:2003P&SS...51..105A. doi:10.1016/S0032-0633(02)00144-7.
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. S2CID 40690489.
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 October 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. S2CID 24957458.
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 October 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. S2CID 4419859.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (September 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. S2CID 14205612.
Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.
Whitmire, Daniel P.; Wright, David P. (April 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. S2CID 250885680.
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 January 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. S2CID 2614136.
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. S2CID 119185094. estimates 700 objects >10⁻⁶ solar masses (roughly the mass of Mars) per main-sequence star between 0.08 and 1 Solar mass, of which there are billions in the Milky Way.
Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, Eduardo L.; Queloz, D.; Mayor, M.; Udry, S. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". Astronomy & Astrophysics. 556: 133. arXiv:1306.3225. Bibcode:2013A&A...556A.133S. doi:10.1051/0004-6361/201321871. S2CID 119193690.
Evans, J. E.; Maunder, E. W. (June 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.
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 (October 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.
Ailleris, Philippe (January–February 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

Loeb, Abraham (October 2014). "The Habitable Epoch of the Early Universe" (PDF). International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613. Bibcode:2014IJAsB..13..337L. doi:10.1017/S1473550414000196. S2CID 2777386. Retrieved 15 December 2014.
Aguilar, David A.; Pulliam, Christine (25 February 2013). "Future Evidence for Extraterrestrial Life Might Come from Dying Stars". Harvard-Smithsonian Center for Astrophysics. Release 2013-06. Retrieved 9 June 2017.

iap.fr (Global: low place; English: low place)

planet.iap.fr

"Discovery of OGLE 2005-BLG-390Lb, the first cool rocky/icy exoplanet". IAP.fr. 25 January 2006. Archived from the original on 18 January 2019. Retrieved 29 October 2006.

ipap.jp (Global: low place; English: low place)

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. S2CID 16349463. Archived from the original on 2 October 2008.

jstor.org (Global: 26^th place; English: 20^th place)

Beck, Lewis White (1971). "Extraterrestrial Intelligent Life". Proceedings and Addresses of the American Philosophical Association. 45: 5–21. doi:10.2307/3129745. JSTOR 3129745.

latimes.com (Global: 22^nd place; English: 19^th place)

Khan, Amina (4 November 2013). "Milky Way may host billions of Earth-size planets". Los Angeles Times. Retrieved 5 November 2013.

liebertpub.com (Global: low place; English: low place)

Marion, Giles M.; Fritsen, Christian H.; Eicken, Hajo; Payne, Meredith C. (1 December 2003). "The search for life on Europa: Limiting environmental factors, potential habitats, and Earth analogues". Astrobiology. 3 (4): 785–811. Bibcode:2003AsBio...3..785M. doi:10.1089/153110703322736105. ISSN 1531-1074. PMID 14987483.

loc.gov (Global: 70^th place; English: 63^rd place)

"Peoples & Creatures of the Moon | Life on Other Worlds | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress". Library of Congress, Washington, D.C. 20540 USA. Retrieved 10 May 2024.
"Seeing and Interpreting Martian Oceans and Canals | Life on Other Worlds | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress". Library of Congress, Washington, D.C. 20540 USA. Retrieved 10 May 2024.

nap.edu (Global: 2,128^th place; English: 1,553^rd place)

National Research Council (2007). "6.2.2: Nonpolar Solvents". The Limits of Organic Life in Planetary Systems. The National Academies Press. p. 74. Bibcode:2007nap..book11919N. doi:10.17226/11919. ISBN 978-0-309-10484-5.

nasa.gov (Global: 75^th place; English: 83^rd place)

nasa.gov

Steigerwald, John (8 August 2011). "NASA Researchers: DNA Building Blocks Can Be Made in Space". NASA. Archived from the original on 11 May 2020. Retrieved 10 August 2011.
"NASA – Kepler". Archived from the original on 5 November 2013. Retrieved 4 November 2013.
Harrington, J. D.; Johnson, M. (4 November 2013). "NASA Kepler Results Usher in a New Era of Astronomy".
"Life's Working Definition: Does It Work?". NASA. 2002. Archived from the original on 26 May 2018. Retrieved 17 January 2022.

exoplanets.nasa.gov

Pat Brennan (10 November 2020). "Life in Our Solar System? Meet the Neighbors". NASA. Retrieved 30 March 2023.
Pat Brennan. "Searching for Signs of Intelligent Life: Technosignatures". NASA. Retrieved 4 July 2023.

jpl.nasa.gov

Cofield, Calla; Chou, Felicia (25 June 2018). "NASA Asks: Will We Know Life When We See It?". NASA. Retrieved 26 June 2018.
Webster, Guy (27 February 2014). "NASA Scientists Find Evidence of Water in Meteorite, Reviving Debate Over Life on Mars". NASA. Archived from the original on 1 March 2014. Retrieved 27 February 2014.

science.nasa.gov

"Overview - NASA Science". 1 September 2020. Retrieved 12 February 2025.

nationalgeographic.com (Global: 344^th place; English: 296^th place)

Ker Than (30 August 2012). "Sugar Found In Space: A Sign of Life?". National Geographic. Retrieved 4 July 2023.

nature.com (Global: 234^th place; English: 397^th place)

Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.

newscientist.com (Global: 774^th place; English: 716^th place)

Pickrell, John (4 September 2006). "Top 10: Controversial pieces of evidence for extraterrestrial life". New Scientist. Retrieved 18 February 2011.
"France opens up its UFO files". New Scientist. 22 March 2007.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

Damer, Bruce; Deamer, David (1 April 2020). "The Hot Spring Hypothesis for an Origin of Life". Astrobiology. 20 (4): 429–452. Bibcode:2020AsBio..20..429D. doi:10.1089/ast.2019.2045. ISSN 1531-1074. PMC 7133448. PMID 31841362.
Marion, Giles M.; Fritsen, Christian H.; Eicken, Hajo; Payne, Meredith C. (1 December 2003). "The search for life on Europa: Limiting environmental factors, potential habitats, and Earth analogues". Astrobiology. 3 (4): 785–811. Bibcode:2003AsBio...3..785M. doi:10.1089/153110703322736105. ISSN 1531-1074. PMID 14987483.
Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.
Pace, Norman R. (20 January 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.
Daniel, Isabelle; Oger, Philippe; Winter, Roland (2006). "Origins of life and biochemistry under high-pressure conditions". Chemical Society Reviews. 35 (10): 858–875. doi:10.1039/b517766a. ISSN 0306-0012. PMID 17003893.
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. S2CID 40690489.
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 October 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. S2CID 24957458.
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 October 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. S2CID 4419859.
Cassan, A.; et al. (11 January 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. S2CID 2614136.
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.
Demets, René (October 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.

ncbi.nlm.nih.gov

Damer, Bruce; Deamer, David (1 April 2020). "The Hot Spring Hypothesis for an Origin of Life". Astrobiology. 20 (4): 429–452. Bibcode:2020AsBio..20..429D. doi:10.1089/ast.2019.2045. ISSN 1531-1074. PMC 7133448. PMID 31841362.
Pace, Norman R. (20 January 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.
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.
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.
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.

nytimes.com (Global: 7^th place; English: 7^th place)

Davies, Paul (18 November 2013). "Are We Alone in the Universe?". The New York Times. Archived from the original on 1 January 2022. Retrieved 20 November 2013.
Overbye, Denni (6 January 2015). "So Many Earth-Like Planets, So Few Telescopes". The New York Times. Archived from the original on 1 January 2022. Retrieved 6 January 2015.
Dreifus, Claudia (2 December 2014). "Much-Discussed Views That Go Way Back – Avi Loeb Ponders the Early Universe, Nature and Life". The New York Times. Retrieved 3 December 2014.
Overbye, Dennis (3 August 2015). "The Flip Side of Optimism About Life on Other Planets". The New York Times. Archived from the original on 1 January 2022. Retrieved 29 October 2015.
Chang, Kenneth; Stirone, Shannon (8 February 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. Retrieved 8 February 2021.
Chang, Kenneth (14 December 2023). "Poison Gas Hints at Potential for Life on an Ocean Moon of Saturn - A researcher who has studied the icy world said "the prospects for the development of life are getting better and better on Enceladus."". The New York Times. Archived from the original on 14 December 2023. Retrieved 15 December 2023.
Chang, Kenneth (24 August 2016). "One Star Over, a Planet That Might Be Another Earth". The New York Times. Archived from the original on 1 January 2022. Retrieved 4 September 2016.
Borenstein, Seth (13 February 2015). "Should We Call the Cosmos Seeking ET? Or Is That Risky?". The New York Times. Associated Press. Archived from the original on 14 February 2015.

ox.ac.uk (Global: 613^th place; English: 456^th place)

"Aliens may be more like us than we think". University of Oxford. 31 October 2017.

pbs.org (Global: 198^th place; English: 154^th place)

Aguirre, L. (1 July 2008). "The Drake Equation". Nova ScienceNow. PBS. Retrieved 7 March 2010.

positiveatheism.org (Global: low place; English: low place)

"Giordano Bruno: On the Infinite Universe and Worlds (De l'Infinito Universo et Mondi) Introductory Epistle: Argument of the Third Dialogue". Archived from the original on 13 October 2014. Retrieved 4 October 2014.

princeton.edu (Global: 741^st place; English: 577^th place)

Morgan Kelly (26 April 2012). "Expectation of extraterrestrial life built more on optimism than evidence, study finds". Princeton University. Retrieved 22 April 2023.

rsc.org (Global: 2,020^th place; English: 1,872^nd place)

xlink.rsc.org

Daniel, Isabelle; Oger, Philippe; Winter, Roland (2006). "Origins of life and biochemistry under high-pressure conditions". Chemical Society Reviews. 35 (10): 858–875. doi:10.1039/b517766a. ISSN 0306-0012. PMID 17003893.

science.org (Global: 1,160^th place; English: 737^th place)

Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.

sciencedaily.com (Global: 993^rd place; English: 920^th place)

"Astronomers Discover Complex Organic Matter Exists Throughout the Universe". ScienceDaily. 26 October 2011. Retrieved 27 October 2011.

scientificamerican.com (Global: 896^th place; English: 674^th place)

Mann, Adam (1 December 2020). "Want to Talk to Aliens? Try Changing the Technological Channel beyond Radio". Scientific American. Retrieved 10 May 2024.
Avi Loeb (4 April 2021). "When Did Life First Emerge in the Universe?". Scientific American. Retrieved 17 April 2023.
Paul Davies (1 September 2016). "The Cosmos Might Be Mostly Devoid of Life". Scientific American. Retrieved 8 July 2022.

scitech.org.au (Global: low place; English: low place)

particle.scitech.org.au

Wheeler, Michelle (14 July 2017). "Is China The Next Space Superpower?". Particle.

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.
Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (June 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. ISSN 0094-5765. S2CID 16889489.
Loeb, Abraham (October 2014). "The Habitable Epoch of the Early Universe" (PDF). International Journal of Astrobiology. 13 (4): 337–339. arXiv:1312.0613. Bibcode:2014IJAsB..13..337L. doi:10.1017/S1473550414000196. S2CID 2777386. Retrieved 15 December 2014.
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. S2CID 121060763.
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. S2CID 16349463. Archived from the original on 2 October 2008.
Swift, Jonathan J.; Johnson, John Asher; Morton, Timothy D.; Crepp, Justin R.; Montet, Benjamin T.; et al. (January 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. S2CID 43750666.
Bond, Jade C.; O'Brien, David P.; Lauretta, Dante S. (June 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. S2CID 118481496.
Stevenson, David S.; Large, Sean (25 October 2017). "Evolutionary exobiology: Towards the qualitative assessment of biological potential on exoplanets". International Journal of Astrobiology. 18 (3): 204–208. doi:10.1017/S1473550417000349. S2CID 125275411.
Marcq, Emmanuel; Mills, Franklin P.; Parkinson, Christopher D.; Vandaele, Ann Carine (30 November 2017). "Composition and Chemistry of the Neutral Atmosphere of Venus" (PDF). Space Science Reviews. 214 (1): 10. doi:10.1007/s11214-017-0438-5. ISSN 1572-9672. S2CID 255067610.
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. S2CID 40690489.
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 October 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. S2CID 24957458.
Kwok, Sun; Zhang, Yong (26 October 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. S2CID 4419859.
Jørgensen, Jes K.; Favre, Cécile; Bisschop, Suzanne E.; Bourke, Tyler L.; van Dishoeck, Ewine F.; Schmalzl, Markus (September 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. S2CID 14205612.
Peter, Jonah S.; et al. (14 December 2023). "Detection of HCN and diverse redox chemistry in the plume of Enceladus". Nature Astronomy. 8 (2): 164–173. arXiv:2301.05259. Bibcode:2024NatAs...8..164P. doi:10.1038/s41550-023-02160-0. S2CID 255825649. Archived from the original on 15 December 2023. Retrieved 15 December 2023.
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. S2CID 250885680.
Cassan, A.; et al. (11 January 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. S2CID 2614136.
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. S2CID 119185094. estimates 700 objects >10⁻⁶ solar masses (roughly the mass of Mars) per main-sequence star between 0.08 and 1 Solar mass, of which there are billions in the Milky Way.
Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, Eduardo L.; Queloz, D.; Mayor, M.; Udry, S. (August 2013). "Astrometric orbit of a low-mass companion to an ultracool dwarf". Astronomy & Astrophysics. 556: 133. arXiv:1306.3225. Bibcode:2013A&A...556A.133S. doi:10.1051/0004-6361/201321871. S2CID 119193690.
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. S2CID 144197172.

setileague.org (Global: low place; English: low place)

"Chapter 3 – Philosophy: "Solving the Drake Equation". SETI League. December 2002. Retrieved 24 July 2015.

skyandtelescope.org (Global: low place; English: low place)

Macrobert, Alan (13 October 2016). "About those 2 trillion new galaxies..." Sky & Telescope. Retrieved 24 May 2023.

space.com (Global: 936^th place; English: 713^th place)

Moskowitz, Clara (29 March 2012). "Life's Building Blocks May Have Formed in Dust Around Young Sun". Space.com. Retrieved 30 March 2012.
Vicky Stein (16 February 2023). "Goldilocks zone: Everything you need to know about the habitable sweet spot". Space.com. Retrieved 22 April 2023.
"100 Billion Alien Planets Fill Our Milky Way Galaxy: Study". Space.com. 2 January 2013. Archived from the original on 3 January 2013. Retrieved 10 March 2016.
Gannon, Megan (28 February 2014). "Mars Meteorite with Odd 'Tunnels' & 'Spheres' Revives Debate Over Ancient Martian Life". Space.com. Retrieved 28 February 2014.
Berger, Brian (16 February 2005). "Exclusive: NASA Researchers Claim Evidence of Present Life on Mars". Space.com.
Chow, Dennis (22 July 2011). "NASA's Next Mars Rover to Land at Huge Gale Crater". Space.com. Retrieved 22 July 2011.
Cofield, Calla (30 March 2015). "Catalog of Earth Microbes Could Help Find Alien Life". Space.com. Retrieved 11 May 2015.
Chow, Denise (26 October 2011). "Discovery: Cosmic Dust Contains Organic Matter from Stars". Space.com. Retrieved 26 October 2011.
Than, Ker (24 April 2007). "Major Discovery: New Planet Could Harbor Water and Life". Space.com.
Wall, Mike (4 April 2012). "NASA Extends Planet-Hunting Kepler Mission Through 2016". Space.com.
Nola Taylor Tillman (20 August 2012). "The Face on Mars: Fact & Fiction". Space.com. Retrieved 18 September 2022.

spacelegalissues.com (Global: low place; English: low place)

Matignon, Louis (29 May 2019). "The French anti-UFO Municipal Law of 1954". Space Legal Issues. Archived from the original on 27 April 2021. Retrieved 26 March 2021.

spacetoday.net (Global: low place; English: low place)

"NASA denies Mars life reports". spacetoday.net. 19 February 2005.

springer.com (Global: 274^th place; English: 309^th place)

link.springer.com

Mapelli, Francesca; Marasco, Ramona; Rolli, Eleonora; Daffonchio, Daniele; Donachie, Stuart; Borin, Sara (2015), Rouwet, Dmitri; Christenson, Bruce; Tassi, Franco; Vandemeulebrouck, Jean (eds.), "Microbial Life in Volcanic Lakes", Volcanic Lakes, Berlin, Heidelberg: Springer Berlin Heidelberg, pp. 507–522, doi:10.1007/978-3-642-36833-2_23, hdl:2434/266460, ISBN 978-3-642-36832-5, retrieved 17 April 2024

tass.ru (Global: 260^th place; English: 1,423^rd place)

"Рогозин допустил существование жизни на Марсе и других планетах Солнечной системы". ТАСС.

theatlantic.com (Global: 228^th place; English: 158^th place)

Green, Jaime (5 December 2023). "What Is Life? - The answer matters in space exploration. But we still don't really know". The Atlantic. Archived from the original on 5 December 2023. Retrieved 15 December 2023.

time.com (Global: 61^st place; English: 54^th place)

Kluger, Jeffrey (2 March 2020). "Coronavirus Could Preview What Will Happen When Alien Life Reaches Earth". Time.

timesofisrael.com (Global: 571^st place; English: 403^rd place)

Jeffay, Nathan (10 December 2020). "Israeli space chief says aliens may well exist, but they haven't met humans". The Times of Israel.

ucr.edu (Global: 1,553^rd place; English: 1,008^th place)

ucrtoday.ucr.edu

Nightingale, Sarah (25 June 2018). "UCR Team Among Scientists Developing Guidebook for Finding Life Beyond Earth". UCR Today. University of California, Riverside. Retrieved 26 June 2018.

un.org (Global: 97^th place; English: 164^th place)

"Press Conference by Director of Office for Outer Space Affairs". UN Press. 14 October 2010.

upr.edu (Global: low place; English: low place)

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 January 2012. Archived from the original on 25 July 2015. Retrieved 25 July 2015.

usra.edu (Global: 2,838^th place; English: 2,185^th place)

lpi.usra.edu

Rampelotto, P. H. (April 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.

washington.edu (Global: 1,067^th place; English: 749^th place)

depts.washington.edu

"What Is Astrobiology?". University of Washington. Retrieved 28 April 2023.

washingtonpost.com (Global: 34^th place; English: 27^th place)

Frank, Adam (31 December 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. Retrieved 1 January 2021.

web.archive.org (Global: 1^st place; English: 1^st place)

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. S2CID 16349463. Archived from the original on 2 October 2008.
"100 Billion Alien Planets Fill Our Milky Way Galaxy: Study". Space.com. 2 January 2013. Archived from the original on 3 January 2013. Retrieved 10 March 2016.
Crenson, Matt (6 August 2006). "Experts: Little Evidence of Life on Mars". Associated Press. Archived from the original on 16 April 2011. Retrieved 8 March 2011.
Webster, Guy (27 February 2014). "NASA Scientists Find Evidence of Water in Meteorite, Reviving Debate Over Life on Mars". NASA. Archived from the original on 1 March 2014. Retrieved 27 February 2014.
"ExoMars rover". ESA. Archived from the original on 19 October 2012. Retrieved 14 April 2014.
Steigerwald, John (8 August 2011). "NASA Researchers: DNA Building Blocks Can Be Made in Space". NASA. Archived from the original on 11 May 2020. Retrieved 10 August 2011.
"Discovery of OGLE 2005-BLG-390Lb, the first cool rocky/icy exoplanet". IAP.fr. 25 January 2006. Archived from the original on 18 January 2019. Retrieved 29 October 2006.
"NASA – Kepler". Archived from the original on 5 November 2013. Retrieved 4 November 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 January 2012. Archived from the original on 25 July 2015. Retrieved 25 July 2015.
Sanders, R. (4 November 2013). "Astronomers answer key question: How common are habitable planets?". newscenter.berkeley.edu. Archived from the original on 7 November 2014. Retrieved 25 July 2015.
Wiker, Benjamin D. (4 November 2002). "Alien Ideas: Christianity and the Search for Extraterrestrial Life". Crisis Magazine. Archived from the original on 10 February 2003.
"Giordano Bruno: On the Infinite Universe and Worlds (De l'Infinito Universo et Mondi) Introductory Epistle: Argument of the Third Dialogue". Archived from the original on 13 October 2014. Retrieved 4 October 2014.
"Life's Working Definition: Does It Work?". NASA. 2002. Archived from the original on 26 May 2018. Retrieved 17 January 2022.
Borenstein, Seth (13 February 2015). "Should We Call the Cosmos Seeking ET? Or Is That Risky?". The New York Times. Associated Press. Archived from the original on 14 February 2015.
Matignon, Louis (29 May 2019). "The French anti-UFO Municipal Law of 1954". Space Legal Issues. Archived from the original on 27 April 2021. Retrieved 26 March 2021.
"China Focus: Earth's largest radio telescope to search for "new worlds" outside solar system". Archived from the original on 11 July 2019.

wku.edu (Global: low place; English: 7,738^th place)

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 (Global: 5^th place; English: 5^th place)

search.worldcat.org

Shibuya, Takazo; Takai, Ken (16 November 2022). "Liquid and supercritical CO2 as an organic solvent in Hadean seafloor hydrothermal systems: implications for prebiotic chemical evolution". Progress in Earth and Planetary Science. 9 (1) 60. doi:10.1186/s40645-022-00510-6. ISSN 2197-4284.
Damer, Bruce; Deamer, David (1 April 2020). "The Hot Spring Hypothesis for an Origin of Life". Astrobiology. 20 (4): 429–452. Bibcode:2020AsBio..20..429D. doi:10.1089/ast.2019.2045. ISSN 1531-1074. PMC 7133448. PMID 31841362.
Marion, Giles M.; Fritsen, Christian H.; Eicken, Hajo; Payne, Meredith C. (1 December 2003). "The search for life on Europa: Limiting environmental factors, potential habitats, and Earth analogues". Astrobiology. 3 (4): 785–811. Bibcode:2003AsBio...3..785M. doi:10.1089/153110703322736105. ISSN 1531-1074. PMID 14987483.
Heuer, Verena B.; Inagaki, Fumio; Morono, Yuki; Kubo, Yusuke; Spivack, Arthur J.; Viehweger, Bernhard; Treude, Tina; Beulig, Felix; Schubotz, Florence; Tonai, Satoshi; Bowden, Stephen A. (4 December 2020). "Temperature limits to deep subseafloor life in the Nankai Trough subduction zone". Science. 370 (6521): 1230–1234. Bibcode:2020Sci...370.1230H. doi:10.1126/science.abd7934. hdl:2164/15700. ISSN 0036-8075. PMID 33273103. S2CID 227257205.
Baum, Seth; Haqq-Misra, Jacob; Domagal-Goldman, Shawn (June 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. ISSN 0094-5765. S2CID 16889489.
Drake, Frank (July 2013). "Reflections on the Equation". International Journal of Astrobiology. 12 (3): 173–176. doi:10.1017/S1473550413000207. ISSN 1473-5504.
Daniel, Isabelle; Oger, Philippe; Winter, Roland (2006). "Origins of life and biochemistry under high-pressure conditions". Chemical Society Reviews. 35 (10): 858–875. doi:10.1039/b517766a. ISSN 0306-0012. PMID 17003893.
Dong, Hailiang; Yu, Bingsong (1 September 2007). "Geomicrobiological processes in extreme environments: A review". Episodes. 30 (3): 202–216. doi:10.18814/epiiugs/2007/v30i3/003. ISSN 0705-3797.
Zahnle, Kevin J.; Lupu, Roxana; Catling, David C.; Wogan, Nick (1 June 2020). "Creation and Evolution of Impact-generated Reduced Atmospheres of Early Earth". The Planetary Science Journal. 1 (1): 11. arXiv:2001.00095. Bibcode:2020PSJ.....1...11Z. doi:10.3847/PSJ/ab7e2c. ISSN 2632-3338.
Marcq, Emmanuel; Mills, Franklin P.; Parkinson, Christopher D.; Vandaele, Ann Carine (30 November 2017). "Composition and Chemistry of the Neutral Atmosphere of Venus" (PDF). Space Science Reviews. 214 (1): 10. doi:10.1007/s11214-017-0438-5. ISSN 1572-9672. S2CID 255067610.
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.
Arrhenius, Svante (March 1908). Worlds in the Making: The Evolution of the Universe. trans. H. Borns. Harper & Brothers. OCLC 1935295.

xinhuanet.com (Global: 309^th place; English: 660^th place)

"China Focus: Earth's largest radio telescope to search for "new worlds" outside solar system". Archived from the original on 11 July 2019.

zenodo.org (Global: 621^st place; English: 380^th place)

Evans, J. E.; Maunder, E. W. (June 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.

Extraterrestrial life (English Wikipedia)

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