Please post all your questions about space, rockets, and the space station that may have been inspired by the recent SpaceX Crew Dragon launch.
Remember some common questions have already been asked/answers
[Why does the ISS seem stationary as the Dragon approaches it](https://www.reddit.com/r/explainlikeimfive/comments/gtzjvw/eli5_in_space_if_the_iss_is_traveling_at_17150/)
[Why do rockets curve](https://www.reddit.com/r/explainlikeimfive/comments/gs5kru/eli5why_do_rockets_go_in_a_curved_path_right_from/)
[Why an instantaneous launch window?](https://www.reddit.com/r/explainlikeimfive/comments/grx1ns/eli5_why_do_space_launches_have_to_go_at_an_exact/)
All space, SpaceX, ISS, etc related questions posted outside of this thread will be removed (1730 Eastern Time)
In: Technology
Why are rockets built to go off in stages? what are the benefits?
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