http://www.collectspace.com/news/news-042321a-spacex-crew2-zerog-indicator-penguin-guinguin.html

https://www.youtube.com/watch?v=rjb9FdVdX5I

https://www.spacex.com/crew-dragon

https://stackoverflow.blog/2021/12/27/dont-push-that-button-exploring-the-software-that-flies-spacex-starships/

https://www.youtube.com/watch?v=Pp4CTN6-kzQ

https://www.nytimes.com/2020/05/30/science/spacex-launch-nasa.html

https://www.nytimes.com/interactive/2020/05/26/science/spacex-nasa.html

https://iss-sim.spacex.com/

https://www.bloomberg.com/news/articles/2019-03-03/spacex-crew-dragon-docks-with-international-space-station

https://news.ycombinator.com/item?id=19293916

https://www.scientificamerican.com/article/spacex-crew-dragon-splashes-down-after-historic-test-flight/

https://www.nytimes.com/2020/05/22/science/spacex-nasa-launch.html

https://www.nytimes.com/2021/05/02/science/spacex-nasa-landing.html

https://apnews.com/e087076881f3449fa603e4434d164ac9

https://www.nytimes.com/2020/03/05/science/axiom-space-station.html