Elon Musk
@elonmusk · Jan 26, 2015
If u saw @TheSimpsons and wonder why @SpaceX doesn't use an electric rocket to reach orbit, it is cuz that is impossible
Elon Musk
@elonmusk
Reason is Newton's Third Law. In vacuum, there is nothing to "push" against. You must react against ejected mass.
03:36 AM · January 26, 2015 · 0 views
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