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Space Exploration Beta
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djr

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 3 years, 9 months
  • 10 profile views
  • Last seen 7 hours ago

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Top posts (19) All Questions Answers | Votes Newest

17 Do companies/governments ever sell satellites that are already in space? Jan 21 '17
13 Puzzler - which spacecraft(s) incorporated real wood structural elements? Oct 30 '16
12 What would one need to do to get an amateur satellite into orbit? Dec 9 '17
8 Is it true that hydrogen is the only practical fuel for upper stages? Jul 12 '18
7 Is HAN-water propellant “green” enough to ever be used in a cubesat? Oct 30 '16
6 Why not build rockets out of composite materials? Dec 28 '15
5 How fast is the onset of periodic eclipse for a spacecraft in LEO? Mar 24 '18
5 Why Never-EVER Land? Mar 22 '18
5 How might the experience of a trip to Mars differ in comfort and heath impact from a stint on the ISS? Mar 9 '18
5 Missions at or soon-to-be at Mars and their DSN “codenames”? Mar 8 '18
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