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Top Questions
132 votes

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

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

101 votes

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

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

75 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 '18 at 4:06
space.stackexchange.com

75 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 '17 at 3:57
space.stackexchange.com

63 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 '18 at 14:38
physics.stackexchange.com

62 votes

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

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

58 votes

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

launch rockets payload escape-velocity performance asked Mar 9 '16 at 7:45
space.stackexchange.com

57 votes

What are these engineers doing sitting on a large format drawing of B-47s aircraft?

military strategic-bomber asked Sep 13 '18 at 1:43
aviation.stackexchange.com

54 votes

This image of the Space Shuttle is truly beautiful, but is it real?

iss nasa space-shuttle imaging space-art asked Sep 17 '18 at 7:53
space.stackexchange.com

54 votes

Is 75 meters an exceptionally close distance for two satellites to pass at >6,000 m/s?

collision-avoidance skyfield satellite-constellation asked Dec 13 '16 at 19:47
space.stackexchange.com

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Top Answers
75
Are there any satellites in geosynchronous but not geostationary orbits?
space.stackexchange.com

74
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

65
Why vent $CO_2$ and $H_2$ waste products to space on ISS?
space.stackexchange.com

63
Is pinging the Moon with a laser as shown on “The Big Bang Theory” possible?
space.stackexchange.com

58
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

54
The dreaded apocalyptic asteroid approaches Earth but lands safely on the Moon at zero relative velocity
space.stackexchange.com

52
Could a space colony 1g from the sun work?
space.stackexchange.com

45
Is the SpaceX Falcon Heavy payload (a Tesla car) space junk?
space.stackexchange.com

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

38
Why does the Moon appear gray when passing between the Sun and the Earth?
astronomy.stackexchange.com

33
What would it take to get a message to another star?
space.stackexchange.com

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

30
How is the altitude of a satellite defined, given that the Earth is not spherical?
space.stackexchange.com

28
Are images of exoplanets' surfaces technically possible?
space.stackexchange.com

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

27
Which LEO satellite lost over 30 km of altitude in the geomagnetic storm of 13-14 March 1989?
space.stackexchange.com

27
Could a spy satellite in orbit be recommissioned to do astronomy?
space.stackexchange.com

26
slowest crash on the Moon?
space.stackexchange.com

25
How were these pictures of spacecraft wind tunnel testing taken?
space.stackexchange.com

25
Why does the Mars InSight Lander look wet like a cardboard box that came in contact with water?
space.stackexchange.com

25
Question on giant satellite orbit
space.stackexchange.com

24
How did NASA prevent third parties from spoofing Apollo communications?
space.stackexchange.com

24
Were any toxic metals used in the International Space Station?
space.stackexchange.com

24
Is it really ~648.69 km/s delta-v to “land” on the surface of the Sun?
space.stackexchange.com

24
How do lasers measure short distances (<1cm) when electronics are too slow for time-of-flight to work?
electronics.stackexchange.com

23
Is Quantum Entanglement technology possible for interplanetary communication in future to achieve low real-time latency?
space.stackexchange.com

23
Is it possible to do moon sighting in advance for 5 years with 100% accuracy?
astronomy.stackexchange.com

22
How did Arecibo detect methane lakes on Titan, and image Saturn's rings?
astronomy.stackexchange.com

22
Potential high temperature power sources for a Venus lander
space.stackexchange.com

22
Does SpaceX put Falcon 9 2nd stages carrying geostationary satellites into a temporary sub-orbital trajectory before the second burn?
space.stackexchange.com

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