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8 votes
3 answers
2k views

How cheap would rocket fuel have to be to make Mars colonization feasible (according to Musk)?

5 votes
4 answers
2k views

Could they free up a docking port on ISS by undocking the emergency vehicle and letting it float next to the station for a little while

-1 votes
1 answer
88 views

As the moon industrializes an orbital ring is erected around it. What altitude would render this moon ring visible from Earth even at 'new moon'?

11 votes
2 answers
2k views

Has anyone returned from space in a different vehicle from the one they went up in? And if so who was the first?

2 votes
0 answers
14 views

Is there any advantage to using high slot width in deep space optical communication with pulse position modulation?

4 votes
2 answers
1k views

What do these expressions mean in NASA's Steve Stitch's brief Starliner undocking statement?

14 votes
1 answer
286 views

Does Mars Reconnaissance Orbiter require "reprogramming" when handling communications for newer spacecraft or landers?

30 votes
2 answers
12k views

How many times has there been 13 people inside the ISS and is it hard on the station?

13 votes
3 answers
2k views

Was VentureStar a bad design or simply ahead of its time?

7 votes
1 answer
120 views

Does food go bad on the ISS? How often is food thrown away?

2 votes
0 answers
73 views

What happens when the exhaust goes mach one

21 votes
1 answer
5k views

Would replacing a damaged tank have prevented the Apollo 13 incident?

10 votes
4 answers
2k views

What asteroids have the least delta-v to reach?

7 votes
0 answers
205 views

Which airplanes designed for Earth could also fly on Mars?

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