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Top Questions
158 votes

How did the Apollo computers evaluate transcendental functions like sine, arctangent, log?

apollo-program history mathematics flight-computer asked Sep 27, 2018 at 10:18
space.stackexchange.com

114 votes

What makes Ada the language of choice for the ISS's safety-critical systems?

iss safety software flight-computer computing asked Jun 3, 2019 at 7:37
space.stackexchange.com

98 votes

What aspects of image preparation workflows can lead to accidents like Boris Johnson's No. 10 tweet's 'hidden message'?

image asked Nov 11, 2020 at 1:59
security.stackexchange.com

87 votes

How much bigger could Earth be, before rockets wouldn't work?

launch rockets payload escape-velocity performance asked Mar 9, 2016 at 7:45
space.stackexchange.com

84 votes

What can the KSP game actually teach about spaceflight and orbital mechanics, and what are its limitations?

orbital-mechanics crewed-spaceflight uncrewed-spaceflight kerbal-space-program education asked Aug 30, 2017 at 3:57
space.stackexchange.com

81 votes

Could "peak Apollo levels" of support have gotten NASA astronauts to Mars in the 1980's?

mars crewed-spaceflight apollo-program asked Jun 20, 2018 at 4:06
space.stackexchange.com

69 votes

Why did it take so long to notice that the ozone layer had holes in it? Which satellite provided the data?

nasa atmosphere earth-observation weather asked Jan 11, 2021 at 14:15
space.stackexchange.com

66 votes

What's the physics behind XKCD #2027 (time between lightning flash and radio wave burst)?

visible-light electromagnetic-radiation refraction radio radio-frequency asked Aug 1, 2018 at 14:38
physics.stackexchange.com

64 votes

How is stacking oranges in 24 dimensions related to receiving and decoding signals from the Voyagers?

history voyager data-transmission noise algorithms asked Jul 7, 2021 at 11:48
space.stackexchange.com

62 votes

What does "Scientists rise up against statistical significance" mean? (Comment in Nature)

statistical-significance p-value bias asked Mar 21, 2019 at 1:19
stats.stackexchange.com

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Top Answers
95
If a massive object like Jupiter flew past the Earth how close would it need to come to pull people off of the surface?
astronomy.stackexchange.com

93
Are there any satellites in geosynchronous but not geostationary orbits?
space.stackexchange.com

69
Why vent $CO_2$ and $H_2$ waste products to space on ISS?
space.stackexchange.com

67
Sun constantly converts mass into energy, will this cause its gravity to decrease?
astronomy.stackexchange.com

66
Is pinging the Moon with a laser as shown on "The Big Bang Theory" possible?
space.stackexchange.com

59
Why didn't the Space Shuttle bounce back into space as many times as possible so as to lose a lot of kinetic energy up there?
space.stackexchange.com

57
The dreaded apocalyptic asteroid approaches Earth but lands safely on the Moon at zero relative velocity
space.stackexchange.com

55
Why is JWST parked in sunlight, rather than using a nuclear battery?
space.stackexchange.com

54
Could a space colony 1g from the sun work?
space.stackexchange.com

52
Why does the alignment evaluation image from JWST look like this?
astronomy.stackexchange.com

49
Why does the sky of Mars appear blue in this video of pictures sent back by the Chinese rover?
space.stackexchange.com

44
Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?
space.stackexchange.com

43
Why did multiple nations decide to launch Mars projects at exactly the same time?
space.stackexchange.com

42
Why does the Moon appear gray when passing between the Sun and the Earth?
astronomy.stackexchange.com

41
Is Nibiru real or totally science fiction?
space.stackexchange.com

38
What is this wavy light coming through my blinds?
physics.stackexchange.com

34
What would it take to get a message to another star?
space.stackexchange.com

33
Help with becoming overly obsessive (about mathematics)
academia.stackexchange.com

33
What impact will the deorbiting of thousands of satellites have on the atmosphere?
space.stackexchange.com

32
How is the altitude of a satellite defined, given that the Earth is not spherical?
space.stackexchange.com

31
Could we carve a large radio dish in the Antarctic ice?
astronomy.stackexchange.com

30
Are images of exoplanets' surfaces technically possible?
space.stackexchange.com

30
Which LEO satellite lost over 30 km of altitude in the geomagnetic storm of 13-14 March 1989?
space.stackexchange.com

30
How far have astronauts been in space?
space.stackexchange.com

29
How can electronics on board of JWST survive the low operating temperature while it's difficult to survive lunar nights?
space.stackexchange.com

28
Is Venus in some way tidally locked to... Earth?
astronomy.stackexchange.com

28
Why does the Mars InSight Lander look wet like a cardboard box that came in contact with water?
space.stackexchange.com

28
Could a spy satellite in orbit be recommissioned to do astronomy?
space.stackexchange.com

27
Why are RTGs different colors?
space.stackexchange.com

27
Is it ethical for Chang'e-4 to bring an entire ecosystem to the moon?
space.stackexchange.com

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