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Greg's user avatar
Greg
  • Member for 5 years, 4 months
  • Last seen more than a week ago
21 votes
1 answer
3k views

What was so hard about the washer nuts on the JWST?

4 votes
2 answers
772 views

Who uses a countdown, and who doesn't?

1 vote
0 answers
77 views

Could "days" on the space Station be made shorter to accomodate sleep patterns?

17 votes
3 answers
2k views

Is it always one nozzle per combustion chamber and one combustion chamber per nozzle?

9 votes
3 answers
1k views

Why are lunar orbits unstable?

15 votes
3 answers
2k views

Did Ed White, on his Gemini 4 spacewalk, have to release pressure from his suit to reenter the capsule?

6 votes
1 answer
144 views

Who started conducting multiple-payload launches routinely, and on which vechicle?

3 votes
1 answer
145 views

Does every satellite operator build and operate their own ground station?

6 votes
0 answers
66 views

What specific contributions have ballooning experiments made to manned space flight?

4 votes
1 answer
674 views

How does an Atlas V control roll?

7 votes
1 answer
172 views

Do/could we have a mission ready to go for unexpected extrasolar objects?

52 votes
3 answers
4k views

In what state are satellites left in when they are left in a graveyard orbit?

8 votes
2 answers
1k views

Do any rocket engines besides the F1 need/require baffles?

2 votes
0 answers
89 views

What is a good book on pre-Mercury space programs?

5 votes
2 answers
402 views

How long does it take to refresh helium-3 on the moon?

11 votes
1 answer
154 views

Examples of space research applied to Earthly manufacturing

7 votes
1 answer
878 views

How precise must a satellite's orbit be?

8 votes
3 answers
2k views

Why "strap-on" boosters, and how do other people say it?

8 votes
3 answers
1k views

Why doesn't Rocket Lab use a solid stage?

2 votes
0 answers
92 views

LOX as annular heat sink

3 votes
1 answer
479 views

What is happening with Zero2Infinity and the Bloostar?

2 votes
0 answers
223 views

What happened to International Microspace's $100 million contract?

2 votes
1 answer
146 views

Molecular propellant in ion engines

8 votes
4 answers
343 views

What prompted all of those private launch companies to get into the business?

3 votes
0 answers
56 views

Where are all the space capsules? [duplicate]

2 votes
1 answer
77 views

What lateral and rotational accelerations can a spacecraft achieve?