Elon Musk
@elonmusk · Jan 26, 2015
And pls don't ask me about space elevators until someone at least builds a carbon nanotube structure longer than a footbridge
Elon Musk
@elonmusk
Ion thrusters are great, but have extremely tiny force (photon thruster even less). Must have more thrust than weight or you don't go up.
04:06 AM · January 26, 2015 · 0 views
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