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52 Answers

Votes Activity Newest
36
How many petaflops does it take to land on the moon? What does Artemis need with an Aitken?
Aug 26 '19 at 16:41
34
Is it possible for a moon to have a higher surface gravity than the planet it is attached to?
Dec 2 '19 at 19:20
25
Would it have been cheaper and/or faster to put a James Webb-like Space Telescope on a balloon instead of a rocket?
Jul 26 at 13:52
24
Can our civilization colonize solar system while reliant on fossil fuels?
Jun 19 at 11:04
21
Double redundancy for the Saturn V LVDC computer memory, how were disagreements resolved?
Aug 11 '19 at 10:59
15
If someone built a vacuum tunnel through the atmosphere, could you have an orbit with a sea level perigee?
Jul 15 at 14:04
14
How did skeptics of rocketry think rockets work?
Aug 9 '19 at 14:52
12
Could a steam engine work on the moon?
Jul 26 at 18:47
9
Why does the Deep Space Atomic Clock have such a short mission?
Jul 21 at 18:55
8
Number of segment in Wing leading Edges
Jul 24 at 14:29
8
SpaceX Body Flaps - Why so Much Power Required
Jun 21 at 11:46
8
What is the atmospheric composition of Venus at the 34 mile (50 km) altitude of the proposed HAVOC program?
Jan 13 at 14:07
8
Is an Earth synchronous (?) polar orbit possible?
Jan 10 at 12:44
8
What kind of camera was used to produce this Apollo-era footage of the Earth?
Jul 29 '19 at 10:37
7
Which operating system is Perseverance running?
Aug 2 at 13:11
7
Why did the Apollo lunar suits have two visors?
Jul 5 at 11:51
7
Could the James Webb Space Telescope detect chlorophyll on a exoplanet?
Jan 8 at 10:01
6
Could a helium balloon on Mars and on Triton float at air pressures lower than it could on Earth due to the bodies' low gravities?
Jun 18 at 13:56
6
Do we know what is the approximate size of this object on Pluto's surface?
Apr 14 at 11:07
5
How do phonesats stay cool?
Jul 4 at 12:41
5
Acceleration and reaction mass?
Jan 8 at 11:07
4
Is there a mathematical formula to calculate drag force without empirical testing?
20 hours ago
4
If Starship works, how much would it cost to create a system of rotable space mirrors that reduces temperatures on earth by 1° C?
2 days ago
4
Getting back from the Moon
Aug 9 at 13:55
4
Mars 2020: What are the advantages of doing two missions to return samples?
Jun 30 at 19:12
4
Visualising orbits from different viewpoints in Python
May 27 at 13:44
4
If solar radiation can heat up gas particles in the thermosphere, why will it not heat up a spacecraft?
Jan 5 at 18:13
4
Why do nuclear rockets (e.g. NERVA) have such poor Thrust-to-Weight ratios?
Jan 4 at 13:16
3
Why would such a powerful computer (or a computer at all) be needed to go to the Moon?
Sep 14 at 12:35
3
Do the Russians use a water deluge system when launching their current rockets?
Aug 28 at 12:25
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