[ 1 ] McCarthy N. Why SpaceX is a game changer for NASA [Internet]. Jersey City: Forbes; 2020 Jun 4 [cited 2020 Jul 8]. Available from: https://www.forbes.com/ sites/niallmccarthy/2020/06/04/why-spacex-is-a-game-changer-for-nasainfographic/#1324196c1656. link1

[ 2 ] Leslie M. The world’s most powerful rocket. Engineering 2019;5(5):822–3. link1

[ 3 ] Galeon D. The NASA–SpaceX partnership saved NASA hundreds of millions [Internet]. New York: Futurism; 2017 Nov 15 [cited 2020 Jul 9]. Available from: https://futurism.com/nasa-spacex-partnership-saved-nasa-hundreds-millions. link1

[ 4 ] Baylor M. Bridenstine, NASA ASAP provide updates on Commercial Crew Program [Internet]. Daytona Beach: Nasaspaceflight; 2020 Jan 8 [cited 2020 Jul 8]. Available from: https://www.nasaspaceflight.com/2020/01/bridenstinenasa-asap-updates-commercial-crew-program/. link1

[ 5 ] Betancourt M. Abort! When a launch goes bad, how do you save the crew? [Internet]. Washington, DC: Air and Space Magazine; 2018 Oct [cited 2020 Jul 9]. Available from: https://www.airspacemag.com/space/abort-180970364/. link1

[ 6 ] Foust J. SpaceX overcame parachute, thruster problems in Crew Dragon development [Internet]. Alexandria: Spacenews; 2020 May 24 [cited 2020 Jul 9]. Available from: https://spacenews.com/spacex-overcame-parachutethruster-problems-in-crew-dragon-development/. link1

[ 7 ] Berger E. SpaceX had a problem during a parachute test in April [Internet]. New York: ArsTechnica; 2019 May 9 [cited 2020 Jul 9]. Available from: https:// arstechnica.com/science/2019/05/spacex-had-a-problem-during-a-parachutetest-in-april/. link1

[ 8 ] Wilson EK. Space tourism moves closer to lift off. Engineering 2019;5 (5):819–21. link1

[ 9 ] Grush L. How the SpaceX Crew Dragon Mission could shape the future of commercial space [Internet]. New York: The Verge; 2020 May 21 [cited 2020 Jul 8]. Available from: https://www.theverge.com/21255700/spacex-crewdragon-mission-launch-nasa-commercial-space-travel-tourism. link1

[10] Gohd C. SpaceX to fly private astronauts to space station for startup Axiom in 2021 [Internet]. New York: Space; 2020 Mar 5 [cited 2020 Aug 7]. Available from: https://www.space.com/spacex-axiom-space-launchingprivate-astronauts-in-2021.html. link1

[11] Grush L. NASA picks SpaceX, Blue Origin, and Dynetics to create landers to take humans to the Moon [Internet]. New York: The Verge; 2020 Apr 30 [cited 2020 Jul 8]. Available from: https://www.theverge.com/2020/4/30/21242837/nasaspacex-blue-origin-dynetics-human-lunar-landers. link1