Interplanetary spaceflight (English Wikipedia)

Wood, B. E.; Hess, P.; Lustig-Yaeger, J.; Gallagher, B.; Korwan, D.; Rich, N.; Stenborg, G.; Thernisien, A.; Qadri, S. N.; Santiago, F.; Peralta, J.; Arney, G. N.; Izenberg, N. R.; Vourlidas, A.; Linton, M. G.; Howard, R. A.; Raouafi, N. E. (9 February 2022). "Parker Solar Probe Imaging of the Night Side of Venus". Geophysical Research Letters. 49 (3) e2021GL096302. Bibcode:2022GeoRL..4996302W. doi:10.1029/2021GL096302. PMC 9286398. PMID 35864851.
Crawford, I.A. (1998). "The Scientific Case for Human Spaceflight". Astronomy and Geophysics. 39 (6): 14–17. Bibcode:1998A&G....39f..14C. Archived from the original on 2019-04-06. Retrieved 2007-04-07.
Schwartz, James (2017). "Myth-free space advocacy part I--The myth of innate exploratory and migratory urges". Acta Astronautica. 137: 450–460. Bibcode:2017AcAau.137..450S. doi:10.1016/j.actaastro.2017.05.002. Retrieved 2024-06-22.
Edwards, Bradley C. (2004). "A Space Elevator Based Exploration Strategy". AIP Conference Proceedings. 699: 854–862. Bibcode:2004AIPC..699..854E. doi:10.1063/1.1649650.
Moravec, H. (1977). "A non-synchronous orbital skyhook". Journal of the Astronautical Sciences. 25 (4): 307–322. Bibcode:1977JAnSc..25..307M.
Mewaldt (2005). "The Cosmic Ray Radiation Dose in Interplanetary Space – Present Day and Worst-Case Evaluations" (PDF). International Cosmic Ray Conference. 2 (29): 433. Bibcode:2005ICRC....2..433M. Archived (PDF) from the original on 4 March 2016. Retrieved 19 October 2021.
Sinyak, Y; Grigoriev, A; Gaydadimov, V; Gurieva, T; Levinskih, M; Pokrovskii, B (2003). "Deuterium-free water (1H2O) in complex life-support systems of long-term space missions". Acta Astronautica. 52 (7): 575–80. Bibcode:2003AcAau..52..575S. doi:10.1016/S0094-5765(02)00013-9. PMID 12575722.
Wilson, John W; Cucinotta, F.A; Shinn, J.L; Simonsen, L.C; Dubey, R.R; Jordan, W.R; Jones, T.D; Chang, C.K; Kim, M.Y (1999). "Shielding from solar particle event exposures in deep space". Radiation Measurements. 30 (3): 361–382. Bibcode:1999RadM...30..361W. doi:10.1016/S1350-4487(99)00063-3. PMID 11543148.

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

Curtis, Howard (2005). Orbital Mechanics for Engineering Students (1st ed.). Elsevier Butterworth-Heinemann. p. 257. ISBN 978-0-7506-6169-0.

arstechnica.com (Global: 473^rd place; English: 338^th place)

Berger, Eric (2016-09-18). "Elon Musk scales up his ambitions, considering going "well beyond" Mars". Ars Technica. Archived from the original on 2016-09-20. Retrieved 2016-09-19.

asme.org (Global: 6,567^th place; English: 3,977^th place)

asmedigitalcollection.asme.org

Aldrin, Buzz; Wachhorst, Wyn (2004). "The Urge to Explore". Mechanical Engineering. 126 (11): 37–38. doi:10.1115/1.2004-NOV-2. Retrieved 2024-06-22.

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

Rees, Martin; Goldsmith, Donald (2022). The End of Astronauts: Why Robots Are the Future of Exploration. Belknap Press. ISBN 978-0-674-25772-6.

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

"Nightside observations by the Parker Solar Probe: implications for the reality of the Ashen Light – British Astronomical Association". British Astronomical Association – Supporting amateur astronomers since 1890. 2024-05-21. Retrieved 2025-03-14.

caltech.edu (Global: 240^th place; English: 473^rd place)

pma.caltech.edu

"Rockets and Space Transportation". Archived from the original on July 1, 2007. Retrieved June 1, 2013.

ugcs.caltech.edu

"Abstracts of NASA articles on solar sails". Archived from the original on 2008-03-11.

srl.caltech.edu

Mewaldt (2005). "The Cosmic Ray Radiation Dose in Interplanetary Space – Present Day and Worst-Case Evaluations" (PDF). International Cosmic Ray Conference. 2 (29): 433. Bibcode:2005ICRC....2..433M. Archived (PDF) from the original on 4 March 2016. Retrieved 19 October 2021.

discovermagazine.com (Global: 3,982^nd place; English: 2,975^th place)

"Gravity's Rim". discovermagazine.com. Archived from the original on 2019-10-22. Retrieved 2023-04-12.

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

Wood, B. E.; Hess, P.; Lustig-Yaeger, J.; Gallagher, B.; Korwan, D.; Rich, N.; Stenborg, G.; Thernisien, A.; Qadri, S. N.; Santiago, F.; Peralta, J.; Arney, G. N.; Izenberg, N. R.; Vourlidas, A.; Linton, M. G.; Howard, R. A.; Raouafi, N. E. (9 February 2022). "Parker Solar Probe Imaging of the Night Side of Venus". Geophysical Research Letters. 49 (3) e2021GL096302. Bibcode:2022GeoRL..4996302W. doi:10.1029/2021GL096302. PMC 9286398. PMID 35864851.
Aldrin, Buzz; Wachhorst, Wyn (2004). "The Urge to Explore". Mechanical Engineering. 126 (11): 37–38. doi:10.1115/1.2004-NOV-2. Retrieved 2024-06-22.
Schwartz, James (2017). "Myth-free space advocacy part I--The myth of innate exploratory and migratory urges". Acta Astronautica. 137: 450–460. Bibcode:2017AcAau.137..450S. doi:10.1016/j.actaastro.2017.05.002. Retrieved 2024-06-22.
Edwards, Bradley C. (2004). "A Space Elevator Based Exploration Strategy". AIP Conference Proceedings. 699: 854–862. Bibcode:2004AIPC..699..854E. doi:10.1063/1.1649650.
Colombo, G.; Gaposchkin, E. M.; Grossi, M. D.; Weiffenbach, G. C. (1975). "The sky-hook: a shuttle-borne tool for low-orbital-altitude research". Meccanica. 10 (1): 3–20. doi:10.1007/bf02148280. S2CID 123134965.
Sinyak, Y; Grigoriev, A; Gaydadimov, V; Gurieva, T; Levinskih, M; Pokrovskii, B (2003). "Deuterium-free water (1H2O) in complex life-support systems of long-term space missions". Acta Astronautica. 52 (7): 575–80. Bibcode:2003AcAau..52..575S. doi:10.1016/S0094-5765(02)00013-9. PMID 12575722.
Wilson, John W; Cucinotta, F.A; Shinn, J.L; Simonsen, L.C; Dubey, R.R; Jordan, W.R; Jones, T.D; Chang, C.K; Kim, M.Y (1999). "Shielding from solar particle event exposures in deep space". Radiation Measurements. 30 (3): 361–382. Bibcode:1999RadM...30..361W. doi:10.1016/S1350-4487(99)00063-3. PMID 11543148.

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

apnews.excite.com

Dunn, Marcia (October 29, 2015). "Report: NASA needs better handle on health hazards for Mars". AP News. Archived from the original on January 30, 2019. Retrieved October 30, 2015.

extremetech.com (Global: 6,470^th place; English: 4,882^nd place)

Templeton, Graham (6 March 2014). "60,000 miles up: Space elevator could be built by 2035, says new study". Extreme Tech. Archived from the original on 2014-04-12. Retrieved 2014-04-19.

ghostarchive.org (Global: 64^th place; English: 28^th place)

Elon Musk (27 September 2016). Making Humans a Multiplanetary Species (video). Guadalajara, Mexico: SpaceX. Event occurs at 9:20–10:10. Archived from the original on 2021-12-11. Retrieved 10 October 2016. So it is a bit tricky. Because we have to figure out how to improve the cost of the trips to Mars by five million percent ... translates to an improvement of approximately 4 1/2 orders of magnitude. These are the key elements that are needed in order to achieve a 4 1/2 order of magnitude improvement. Most of the improvement would come from full reusability—somewhere between 2 and 2 1/2 orders of magnitude—and then the other 2 orders of magnitude would come from refilling in orbit, propellant production on Mars, and choosing the right propellant.
Staff (October 29, 2015). "NASA's Efforts to Manage Health and Human Performance Risks for Space Exploration (IG-16-003)" (PDF). NASA. Archived from the original (PDF) on October 9, 2022. Retrieved October 29, 2015.

huffingtonpost.com (Global: 212^th place; English: 141^st place)

Scharr, Jillian (29 May 2013). "Space Elevators On Hold At Least Until Stronger Materials Are Available, Experts Say". Huffington Post. Archived from the original on 2 March 2014. Retrieved 13 August 2014.

io9.com (Global: 4,391^st place; English: 2,871^st place)

Dvorsky, G. (13 February 2013). "Why we'll probably never build a space elevator". io9.com. Archived from the original on 10 August 2014. Retrieved 13 August 2014.

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

"islandone.org/Settlements". Archived from the original on 2016-04-05. Retrieved 2007-05-20.

jaxa.jp (Global: 3,149^th place; English: 4,634^th place)

iss.jaxa.jp

"iss.jaxa.jp/iss/kibo". Archived from the original on 2016-12-18. Retrieved 2007-05-20.

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

"The Physics of Interstellar Travel: Official Website of Dr. Michio Kaku". Archived from the original on 2019-07-08. Retrieved 2021-09-27.

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

"NASA Team Produces NAUTILUS-X, A Fascinating Spacecraft" Archived 2013-05-26 at the Wayback Machine February 21, 2011

nasa.gov (Global: 12^th place; English: 73^rd place)

nasa.gov

Hatfield, Miles (9 February 2022). "Parker Solar Probe Captures Visible Light Images of Venus' Surface". NASA. Archived from the original on 14 April 2022. Retrieved 29 April 2022.
"NASA.gov" (PDF). Archived from the original (PDF) on 2016-06-02. Retrieved 2016-05-13.
"Radiation Belts -- Fun Facts". NASA. 18 March 2015. Archived from the original on 3 November 2021. Retrieved 19 October 2021.

jpl.nasa.gov

"NASA Spacecraft Embarks on Historic Journey Into Interstellar Space". Jet Propulsion Laboratory. Archived from the original on 20 October 2019. Retrieved 20 February 2014.
"Deep Space 1". www.jpl.nasa.gov. Archived from the original on 2017-11-17. Retrieved 2018-09-12.

www2.jpl.nasa.gov

Dave Doody (2004-09-15). "Basics of Space Flight Section I. The Environment of Space". .jpl.nasa.gov. Retrieved 2016-06-26.

oig.nasa.gov

Staff (October 29, 2015). "NASA's Efforts to Manage Health and Human Performance Risks for Space Exploration (IG-16-003)" (PDF). NASA. Archived from the original (PDF) on October 9, 2022. Retrieved October 29, 2015.

nasaspaceflight.com (Global: 2,029^th place; English: 1,519^th place)

Bergin, Chris (2016-09-27). "SpaceX reveals ITS Mars game changer via colonization plan". NASASpaceFlight.com. Archived from the original on 2019-07-13. Retrieved 2016-09-27.
Belluscio, Alejandro G. (2014-03-07). "SpaceX advances drive for Mars rocket via Raptor power". NASAspaceflight.com. Archived from the original on 2015-09-11. Retrieved 2014-03-07.

nature.com (Global: 207^th place; English: 347^th place)

"nature.com/embor/journal". Archived from the original on 2010-08-21. Retrieved 2007-05-20.

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

"Origin of How Steam Rockets can Reduce Space Transport Cost by Orders of Magnitude". Archived from the original on 2017-11-16. Retrieved 2007-02-16.
""Neofuel" -interplanetary travel using off-earth resources". Archived from the original on 2006-11-16. Retrieved 2006-10-08.

newspaceeconomy.ca (Global: low place; English: low place)

NSE (2023-03-29). "Launch Windows: Timing is Everything". New Space Economy. Retrieved 2024-06-16.

nih.gov (Global: 5^th place; English: 5^th place)

pubmed.ncbi.nlm.nih.gov

Wood, B. E.; Hess, P.; Lustig-Yaeger, J.; Gallagher, B.; Korwan, D.; Rich, N.; Stenborg, G.; Thernisien, A.; Qadri, S. N.; Santiago, F.; Peralta, J.; Arney, G. N.; Izenberg, N. R.; Vourlidas, A.; Linton, M. G.; Howard, R. A.; Raouafi, N. E. (9 February 2022). "Parker Solar Probe Imaging of the Night Side of Venus". Geophysical Research Letters. 49 (3) e2021GL096302. Bibcode:2022GeoRL..4996302W. doi:10.1029/2021GL096302. PMC 9286398. PMID 35864851.
Siniak IuE, Turusov VS; Grigorev, AI; et al. (2003). "[Consideration of the deuterium-free water supply to an expedition to Mars]". Aviakosm Ekolog Med. 37 (6): 60–3. PMID 14959623.
Sinyak, Y; Grigoriev, A; Gaydadimov, V; Gurieva, T; Levinskih, M; Pokrovskii, B (2003). "Deuterium-free water (1H2O) in complex life-support systems of long-term space missions". Acta Astronautica. 52 (7): 575–80. Bibcode:2003AcAau..52..575S. doi:10.1016/S0094-5765(02)00013-9. PMID 12575722.
Wilson, John W; Cucinotta, F.A; Shinn, J.L; Simonsen, L.C; Dubey, R.R; Jordan, W.R; Jones, T.D; Chang, C.K; Kim, M.Y (1999). "Shielding from solar particle event exposures in deep space". Radiation Measurements. 30 (3): 361–382. Bibcode:1999RadM...30..361W. doi:10.1016/S1350-4487(99)00063-3. PMID 11543148.

ncbi.nlm.nih.gov

Wood, B. E.; Hess, P.; Lustig-Yaeger, J.; Gallagher, B.; Korwan, D.; Rich, N.; Stenborg, G.; Thernisien, A.; Qadri, S. N.; Santiago, F.; Peralta, J.; Arney, G. N.; Izenberg, N. R.; Vourlidas, A.; Linton, M. G.; Howard, R. A.; Raouafi, N. E. (9 February 2022). "Parker Solar Probe Imaging of the Night Side of Venus". Geophysical Research Letters. 49 (3) e2021GL096302. Bibcode:2022GeoRL..4996302W. doi:10.1029/2021GL096302. PMC 9286398. PMID 35864851.

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

"NAUTILUS-X: NASA/JSC Multi-Mission Space Exploration Vehicle" (PDF). National Space Society. January 26, 2011. Retrieved 15 March 2025.

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

Chang, Kenneth (2020-04-13). "Apollo 13's Astronauts Survived Disaster 50 Years Ago. Could It Happen Again?". The New York Times. ISSN 0362-4331. Retrieved 2025-03-15.

pewresearch.org (Global: 1,516^th place; English: 983^rd place)

Kennedy, Brian; Tyson, Alec (July 20, 2023). "Americans' Views of Space: U.S. Role, NASA Priorities and Impact of Private Companies". Pew Research Center. Retrieved 2024-06-22.

popularmechanics.com (Global: 2,521^st place; English: 1,621^st place)

Aldrin, B; Noland, D (2005). "Buzz Aldrin's Roadmap To Mars". Popular Mechanics. Archived from the original on 2006-12-11.
Feltman, R. (7 March 2013). "Why Don't We Have Space Elevators?". Popular Mechanics. Archived from the original on 6 August 2014. Retrieved 13 August 2014.
popularmechanics.com Archived 2007-08-14 at the Wayback Machine

princeton.edu (Global: 802^nd place; English: 528^th place)

pupress.princeton.edu

Belbruno, E. (2004). Capture Dynamics and Chaotic Motions in Celestial Mechanics: With the Construction of Low Energy Transfers. Princeton University Press. ISBN 978-0-691-09480-9. Archived from the original on 2014-12-02. Retrieved 2007-04-07.

sciencedirect.com (Global: 137^th place; English: 146^th place)

Schwartz, James (2017). "Myth-free space advocacy part I--The myth of innate exploratory and migratory urges". Acta Astronautica. 137: 450–460. Bibcode:2017AcAau.137..450S. doi:10.1016/j.actaastro.2017.05.002. Retrieved 2024-06-22.

semanticscholar.org (Global: 15^th place; English: 8^th place)

api.semanticscholar.org

Colombo, G.; Gaposchkin, E. M.; Grossi, M. D.; Weiffenbach, G. C. (1975). "The sky-hook: a shuttle-borne tool for low-orbital-altitude research". Meccanica. 10 (1): 3–20. doi:10.1007/bf02148280. S2CID 123134965.

space.com (Global: 862^nd place; English: 703^rd place)

space.com

David, D (2002). "The Space Elevator Comes Closer to Reality". space.com. Archived from the original on 2010-11-04.

uplink.space.com

uplink.space.com Archived 2004-03-28 at the Wayback Machine

spacex.com (Global: 5,295^th place; English: 4,831^st place)

"Making Humans a Multiplanetary Species" (PDF). SpaceX. 2016-09-27. Archived from the original (PDF) on 2016-09-28. Retrieved 2016-09-29.

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

Valentine, L (2002). "A Space Roadmap: Mine the Sky, Defend the Earth, Settle the Universe". Space Studies Institute, Princeton. Archived from the original on 2007-02-23.

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

Hypersonic Airplane Space Tether Orbital Launch (HASTOL) System: Interim Study Results Archived 2016-04-27 at the Wayback Machine

ucl.ac.uk (Global: 1,187^th place; English: 756^th place)

zuserver2.star.ucl.ac.uk

Crawford, I.A. (1998). "The Scientific Case for Human Spaceflight". Astronomy and Geophysics. 39 (6): 14–17. Bibcode:1998A&G....39f..14C. Archived from the original on 2019-04-06. Retrieved 2007-04-07.

usra.edu (Global: 1,836^th place; English: 1,966^th place)

niac.usra.edu

Bogar, Thomas J.; Bangham, Michal E.; Forward, Robert L.; Lewis, Mark J. (7 January 2000). "Hypersonic Airplane Space Tether Orbital Launch System" (PDF). Research Grant No. 07600-018l Phase I Final Report. NASA Institute for Advanced Concepts. Archived (PDF) from the original on 2013-08-21. Retrieved 2014-03-20.

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

"NASA Spacecraft Embarks on Historic Journey Into Interstellar Space". Jet Propulsion Laboratory. Archived from the original on 20 October 2019. Retrieved 20 February 2014.
Hatfield, Miles (9 February 2022). "Parker Solar Probe Captures Visible Light Images of Venus' Surface". NASA. Archived from the original on 14 April 2022. Retrieved 29 April 2022.
Crawford, I.A. (1998). "The Scientific Case for Human Spaceflight". Astronomy and Geophysics. 39 (6): 14–17. Bibcode:1998A&G....39f..14C. Archived from the original on 2019-04-06. Retrieved 2007-04-07.
Valentine, L (2002). "A Space Roadmap: Mine the Sky, Defend the Earth, Settle the Universe". Space Studies Institute, Princeton. Archived from the original on 2007-02-23.
"Rockets and Space Transportation". Archived from the original on July 1, 2007. Retrieved June 1, 2013.
"Gravity's Rim". discovermagazine.com. Archived from the original on 2019-10-22. Retrieved 2023-04-12.
Belbruno, E. (2004). Capture Dynamics and Chaotic Motions in Celestial Mechanics: With the Construction of Low Energy Transfers. Princeton University Press. ISBN 978-0-691-09480-9. Archived from the original on 2014-12-02. Retrieved 2007-04-07.
"NASA.gov" (PDF). Archived from the original (PDF) on 2016-06-02. Retrieved 2016-05-13.
"Deep Space 1". www.jpl.nasa.gov. Archived from the original on 2017-11-17. Retrieved 2018-09-12.
"Nuclear Thermal Propulsion". X-Energy. Archived from the original on 2024-02-07. Retrieved 2024-02-07. One of the main benefits of nuclear thermal propulsion is its efficiency. A nuclear thermal rocket can achieve more than twice the efficiency compared to a conventional chemical rocket because it's propellant is brought to a far higher temperature than can be achieved in a conventional combustion chamber.
"NASA Team Produces NAUTILUS-X, A Fascinating Spacecraft" Archived 2013-05-26 at the Wayback Machine February 21, 2011
PDF C. R. Williams et al., 'Realizing "2001: A Space Odyssey": Piloted Spherical Torus Nuclear Fusion Propulsion', 2001, 52 pages, NASA Glenn Research Center
"The Physics of Interstellar Travel: Official Website of Dr. Michio Kaku". Archived from the original on 2019-07-08. Retrieved 2021-09-27.
"Abstracts of NASA articles on solar sails". Archived from the original on 2008-03-11.
Aldrin, B; Noland, D (2005). "Buzz Aldrin's Roadmap To Mars". Popular Mechanics. Archived from the original on 2006-12-11.
David, D (2002). "The Space Elevator Comes Closer to Reality". space.com. Archived from the original on 2010-11-04.
Hypersonic Airplane Space Tether Orbital Launch (HASTOL) System: Interim Study Results Archived 2016-04-27 at the Wayback Machine
Bogar, Thomas J.; Bangham, Michal E.; Forward, Robert L.; Lewis, Mark J. (7 January 2000). "Hypersonic Airplane Space Tether Orbital Launch System" (PDF). Research Grant No. 07600-018l Phase I Final Report. NASA Institute for Advanced Concepts. Archived (PDF) from the original on 2013-08-21. Retrieved 2014-03-20.
Dvorsky, G. (13 February 2013). "Why we'll probably never build a space elevator". io9.com. Archived from the original on 10 August 2014. Retrieved 13 August 2014.
Feltman, R. (7 March 2013). "Why Don't We Have Space Elevators?". Popular Mechanics. Archived from the original on 6 August 2014. Retrieved 13 August 2014.
Scharr, Jillian (29 May 2013). "Space Elevators On Hold At Least Until Stronger Materials Are Available, Experts Say". Huffington Post. Archived from the original on 2 March 2014. Retrieved 13 August 2014.
Templeton, Graham (6 March 2014). "60,000 miles up: Space elevator could be built by 2035, says new study". Extreme Tech. Archived from the original on 2014-04-12. Retrieved 2014-04-19.
Bergin, Chris (2016-09-27). "SpaceX reveals ITS Mars game changer via colonization plan". NASASpaceFlight.com. Archived from the original on 2019-07-13. Retrieved 2016-09-27.
Belluscio, Alejandro G. (2014-03-07). "SpaceX advances drive for Mars rocket via Raptor power". NASAspaceflight.com. Archived from the original on 2015-09-11. Retrieved 2014-03-07.
"Making Humans a Multiplanetary Species" (PDF). SpaceX. 2016-09-27. Archived from the original (PDF) on 2016-09-28. Retrieved 2016-09-29.
Berger, Eric (2016-09-18). "Elon Musk scales up his ambitions, considering going "well beyond" Mars". Ars Technica. Archived from the original on 2016-09-20. Retrieved 2016-09-19.
"Origin of How Steam Rockets can Reduce Space Transport Cost by Orders of Magnitude". Archived from the original on 2017-11-16. Retrieved 2007-02-16.
""Neofuel" -interplanetary travel using off-earth resources". Archived from the original on 2006-11-16. Retrieved 2006-10-08.
Dunn, Marcia (October 29, 2015). "Report: NASA needs better handle on health hazards for Mars". AP News. Archived from the original on January 30, 2019. Retrieved October 30, 2015.
"Radiation Belts -- Fun Facts". NASA. 18 March 2015. Archived from the original on 3 November 2021. Retrieved 19 October 2021.
Mewaldt (2005). "The Cosmic Ray Radiation Dose in Interplanetary Space – Present Day and Worst-Case Evaluations" (PDF). International Cosmic Ray Conference. 2 (29): 433. Bibcode:2005ICRC....2..433M. Archived (PDF) from the original on 4 March 2016. Retrieved 19 October 2021.
popularmechanics.com Archived 2007-08-14 at the Wayback Machine
"nature.com/embor/journal". Archived from the original on 2010-08-21. Retrieved 2007-05-20.
"islandone.org/Settlements". Archived from the original on 2016-04-05. Retrieved 2007-05-20.
"iss.jaxa.jp/iss/kibo". Archived from the original on 2016-12-18. Retrieved 2007-05-20.
"yarchive.net/space/spacecraft". Archived from the original on 2016-03-08. Retrieved 2007-05-20.
uplink.space.com Archived 2004-03-28 at the Wayback Machine

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Chang, Kenneth (2020-04-13). "Apollo 13's Astronauts Survived Disaster 50 Years Ago. Could It Happen Again?". The New York Times. ISSN 0362-4331. Retrieved 2025-03-15.

x-energy.com (Global: low place; English: low place)

"Nuclear Thermal Propulsion". X-Energy. Archived from the original on 2024-02-07. Retrieved 2024-02-07. One of the main benefits of nuclear thermal propulsion is its efficiency. A nuclear thermal rocket can achieve more than twice the efficiency compared to a conventional chemical rocket because it's propellant is brought to a far higher temperature than can be achieved in a conventional combustion chamber.

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

"yarchive.net/space/spacecraft". Archived from the original on 2016-03-08. Retrieved 2007-05-20.

youtube.com (Global: 13^th place; English: 14^th place)

Elon Musk (27 September 2016). Making Humans a Multiplanetary Species (video). Guadalajara, Mexico: SpaceX. Event occurs at 9:20–10:10. Archived from the original on 2021-12-11. Retrieved 10 October 2016. So it is a bit tricky. Because we have to figure out how to improve the cost of the trips to Mars by five million percent ... translates to an improvement of approximately 4 1/2 orders of magnitude. These are the key elements that are needed in order to achieve a 4 1/2 order of magnitude improvement. Most of the improvement would come from full reusability—somewhere between 2 and 2 1/2 orders of magnitude—and then the other 2 orders of magnitude would come from refilling in orbit, propellant production on Mars, and choosing the right propellant.

Interplanetary spaceflight (English Wikipedia)

adsabs.harvard.edu (Global: 14th place; English: 9th place)

ui.adsabs.harvard.edu

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

arstechnica.com (Global: 473rd place; English: 338th place)

asme.org (Global: 6,567th place; English: 3,977th place)

asmedigitalcollection.asme.org

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caltech.edu (Global: 240th place; English: 473rd place)

pma.caltech.edu

ugcs.caltech.edu

srl.caltech.edu

discovermagazine.com (Global: 3,982nd place; English: 2,975th place)

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

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

apnews.excite.com

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ghostarchive.org (Global: 64th place; English: 28th place)

huffingtonpost.com (Global: 212th place; English: 141st place)

io9.com (Global: 4,391st place; English: 2,871st place)

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

jaxa.jp (Global: 3,149th place; English: 4,634th place)

iss.jaxa.jp

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

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

nasa.gov (Global: 12th place; English: 73rd place)

nasa.gov

jpl.nasa.gov

www2.jpl.nasa.gov

oig.nasa.gov

nasaspaceflight.com (Global: 2,029th place; English: 1,519th place)

nature.com (Global: 207th place; English: 347th place)

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

newspaceeconomy.ca (Global: low place; English: low place)

nih.gov (Global: 5th place; English: 5th place)

pubmed.ncbi.nlm.nih.gov

ncbi.nlm.nih.gov

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

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

pewresearch.org (Global: 1,516th place; English: 983rd place)

popularmechanics.com (Global: 2,521st place; English: 1,621st place)

princeton.edu (Global: 802nd place; English: 528th place)

pupress.princeton.edu

sciencedirect.com (Global: 137th place; English: 146th place)

semanticscholar.org (Global: 15th place; English: 8th place)

api.semanticscholar.org

space.com (Global: 862nd place; English: 703rd place)

space.com

uplink.space.com

spacex.com (Global: 5,295th place; English: 4,831st place)

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

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

ucl.ac.uk (Global: 1,187th place; English: 756th place)

zuserver2.star.ucl.ac.uk

usra.edu (Global: 1,836th place; English: 1,966th place)

niac.usra.edu

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

worldcat.org (Global: 4th place; English: 4th place)

search.worldcat.org

x-energy.com (Global: low place; English: low place)

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

youtube.com (Global: 13th place; English: 14th place)

adsabs.harvard.edu (Global: 14^th place; English: 9^th place)

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

arstechnica.com (Global: 473^rd place; English: 338^th place)

asme.org (Global: 6,567^th place; English: 3,977^th place)

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

caltech.edu (Global: 240^th place; English: 473^rd place)

discovermagazine.com (Global: 3,982^nd place; English: 2,975^th place)

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

extremetech.com (Global: 6,470^th place; English: 4,882^nd place)

ghostarchive.org (Global: 64^th place; English: 28^th place)

huffingtonpost.com (Global: 212^th place; English: 141^st place)

io9.com (Global: 4,391^st place; English: 2,871^st place)

jaxa.jp (Global: 3,149^th place; English: 4,634^th place)

nasa.gov (Global: 12^th place; English: 73^rd place)

nasaspaceflight.com (Global: 2,029^th place; English: 1,519^th place)

nature.com (Global: 207^th place; English: 347^th place)

nih.gov (Global: 5^th place; English: 5^th place)

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

pewresearch.org (Global: 1,516^th place; English: 983^rd place)

popularmechanics.com (Global: 2,521^st place; English: 1,621^st place)

princeton.edu (Global: 802^nd place; English: 528^th place)

sciencedirect.com (Global: 137^th place; English: 146^th place)

semanticscholar.org (Global: 15^th place; English: 8^th place)

space.com (Global: 862^nd place; English: 703^rd place)

spacex.com (Global: 5,295^th place; English: 4,831^st place)

ucl.ac.uk (Global: 1,187^th place; English: 756^th place)

usra.edu (Global: 1,836^th place; English: 1,966^th place)

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

worldcat.org (Global: 4^th place; English: 4^th place)

youtube.com (Global: 13^th place; English: 14^th place)