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djr
  • Member for 5 years, 11 months
  • Last seen this week
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31
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15
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21
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15
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17
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20
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13
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12
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12
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Posts
5
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Top posts
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All Questions Answers Articles
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
8
Is HAN-water propellant "green" enough to ever be used in a cubesat?
Oct 30 '16
6
What is the minimum number of RCS thrusters capable of stabilizing a satellite against an arbitrary rotation?
Mar 11 '16
6
Why not build rockets out of composite materials?
Dec 28 '15
5
If I wanted to try to terraform Mars, who would have the authority to stop me?
Oct 28 '18
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
Top network posts
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84
Are there any binational mass rapid transit systems?
53
Is a 13-hour layover at Heathrow enough time to go see Buckingham Palace?
48
Tips to avoid forgetting a bag
26
How to get to Schiphol Airport at 5am using public transport from Amsterdam?
17
Do I have to validate train tickets in the UK?

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