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Top Questions
42 votes

Is there a working law of gravity in 2D?

reality-check physics gravity alternate-reality 2d asked Mar 3, 2016 at 14:01
worldbuilding.stackexchange.com

40 votes

Why do they have a Snellen eye chart on the ISS?

iss crewed-spaceflight health medical ocular asked Jan 31, 2016 at 22:49
space.stackexchange.com

33 votes

Do any aircraft carry boats?

cargo seaplane asked Sep 8, 2019 at 16:14
aviation.stackexchange.com

26 votes

Can I just stack the Earth?

reality-check alternate-worlds megastructures asked Feb 5, 2016 at 9:52
worldbuilding.stackexchange.com

26 votes

Checkmate 30 kings with rooks

optimization chess asked Jun 22, 2022 at 6:47
puzzling.stackexchange.com

24 votes

Why do the contents of the Space Shuttle External Tank not match the mixture ratio of the engines?

space-shuttle fuel asked Oct 14, 2020 at 12:26
space.stackexchange.com

23 votes

Why did the Apollo Lunar Module have four landing legs?

apollo-program landing lunar-landing landing-gear asked Jan 13, 2016 at 14:34
space.stackexchange.com

21 votes

Optimal depth for underground flyby?

orbital-mechanics flyby patched-conic asked Sep 21, 2022 at 21:07
space.stackexchange.com

20 votes

Is the ideal transfer between two arbitrary planar orbits always a bi-tangential ellipse?

orbital-mechanics orbital-maneuver delta-v bi-tangential-transfer asked Jul 1, 2016 at 16:00
space.stackexchange.com

19 votes

Was the third shuttle engine any different from the others?

launch space-shuttle engine-design ssme asked Jan 25, 2016 at 7:09
space.stackexchange.com

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Top Answers
105
What is the closest distance a human being has come to Mars ever since the beginning of the space age?
space.stackexchange.com

100
How to survive the heat death of the universe?
worldbuilding.stackexchange.com

89
Why would an underwater creature remain lodged to its prey?
worldbuilding.stackexchange.com

82
Building a bridge to the stars
worldbuilding.stackexchange.com

81
Are there any “Third Order” acronyms used in space exploration?
space.stackexchange.com

71
Could we wait for Mars to come to us?
space.stackexchange.com

59
Why did the Soviet Union decide to use 30 small engines instead of a few large ones on the N1?
space.stackexchange.com

58
What scientifically would make it possible that certain large bodies of water be impassable?
worldbuilding.stackexchange.com

57
Does it require less energy to reach the Sun from Pluto's orbit than from Earth's orbit?
space.stackexchange.com

52
Can a moon orbit its planet faster than its planet rotates?
space.stackexchange.com

47
Is there a mockup of the ISS on the ground?
space.stackexchange.com

42
What crimes have been committed or attempted in space?
space.stackexchange.com

41
Why aren't there any active space debris removal systems implemented currently?
space.stackexchange.com

40
Can Kerbal Space Program act as a suitable simulator with the right mods?
space.stackexchange.com

35
Can you really use Arduino for a small spacecraft?
space.stackexchange.com

35
How do space probes find their way and how much fuel do they use to travel?
space.stackexchange.com

34
Draw the flag of Bangladesh
codegolf.stackexchange.com

33
What causes a satellite's orbit to decay?
space.stackexchange.com

33
What changes to Voyager could have been made?
space.stackexchange.com

32
Land a cubesat on the moon with ion engine
space.stackexchange.com

31
Golfball Dimples on spaceships (and planes)?
space.stackexchange.com

30
How much bigger could Earth be, before rockets wouldn't work?
space.stackexchange.com

29
What is the name of the area on Earth which can be observed from a satellite?
space.stackexchange.com

29
Case invert your quine
codegolf.stackexchange.com

28
How are the Mars Rovers maintained?
space.stackexchange.com

27
How many undiscovered planets might be in our solar system?
astronomy.stackexchange.com

27
How could a hot lander enter Titan's atmosphere without setting its hydrocarbons ablaze?
space.stackexchange.com

27
How to force a country to use a language that merges two languages that diverged 1000 years ago?
worldbuilding.stackexchange.com

26
Why does a spacecraft have angular velocity relative to Earth?
space.stackexchange.com

25
Are there any saltwater rivers on Earth?
earthscience.stackexchange.com

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