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62 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
35
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 '20 at 13:52
23
Can our civilization colonize solar system while reliant on fossil fuels?
Jun 19 '20 at 11:04
21
Double redundancy for the Saturn V LVDC computer memory, how were disagreements resolved?
Aug 11 '19 at 10:59
16
What is a “fee area” exactly and why is it named that way?
Sep 24 '20 at 13:05
16
If someone built a vacuum tunnel through the atmosphere, could you have an orbit with a sea level perigee?
Jul 15 '20 at 14:04
14
How did the Perseverance rover land on Mars with the retro rockets apparently stopped?
13 hours ago
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 '20 at 18:47
10
Which operating system is Perseverance running?
Aug 2 '20 at 13:11
9
Why does the Deep Space Atomic Clock have such a short mission?
Jul 21 '20 at 18:55
8
Is there a mathematical formula to calculate drag force without empirical testing?
Sep 17 '20 at 18:39
8
Number of segment in Wing leading Edges
Jul 24 '20 at 14:29
8
SpaceX Body Flaps - Why so Much Power Required
Jun 21 '20 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 '20 at 14:07
8
Is an Earth synchronous (?) polar orbit possible?
Jan 10 '20 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
Why does the Perseverance Rover do sample caching?
2 days ago
7
Why Ingenuity drone has 2 coaxial rotors, not quad-rotor
Feb 20 at 14:28
7
How fast is fuel escaping a rocket for it to reach the escape velocity 11 km/s?
Oct 13 '20 at 10:27
7
Why did the Apollo lunar suits have two visors?
Jul 5 '20 at 11:51
7
Could the James Webb Space Telescope detect chlorophyll on a exoplanet?
Jan 8 '20 at 10:01
6
If Starship works, how much would it cost to create a system of rotable space mirrors that reduces temperatures on earth by 1° C?
Sep 15 '20 at 15:25
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 '20 at 13:56
6
Do we know what is the approximate size of this object on Pluto's surface?
Apr 14 '20 at 11:07
5
What if we launched rockets from space using the slingshot method and centripetal force? Would that be possible?
Jan 26 at 15:00
5
Simple explanation for the 2nd “cosmic speed”
Aug 2 '20 at 13:02
5
How do phonesats stay cool?
Jul 4 '20 at 12:41
5
Acceleration and reaction mass?
Jan 8 '20 at 11:07
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