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Top Questions
41
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
41
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
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
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
20
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
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
18
votes
What is the optimal inclination change strategy?
orbital-mechanics
mathematics
delta-v
inclination-change
asked Aug 15, 2019 at 12:44
space.stackexchange.com
17
votes
What target is the most difficult to reach in the solar system?
orbital-mechanics
mission-design
solar-system
asked Sep 14, 2019 at 17:00
space.stackexchange.com
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Top Answers
102
What is the closest distance a human being has come to Mars ever since the beginning of the space age?
space.stackexchange.com
99
How to survive the heat death of the universe?
worldbuilding.stackexchange.com
87
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
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
45
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
40
Can Kerbal Space Program act as a suitable simulator with the right mods?
space.stackexchange.com
40
Why aren't there any active space debris removal systems implemented currently?
space.stackexchange.com
35
Can you really use Arduino for a small spacecraft?
space.stackexchange.com
34
Draw the flag of Bangladesh
codegolf.stackexchange.com
32
Land a cubesat on the moon with ion engine
space.stackexchange.com
30
Golfball Dimples on spaceships (and planes)?
space.stackexchange.com
29
How much bigger could Earth be, before rockets wouldn't work?
space.stackexchange.com
29
Case invert your quine
codegolf.stackexchange.com
29
What is the name of the area on Earth which can be observed from a satellite?
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
27
How are the Mars Rovers maintained?
space.stackexchange.com
26
Why does a spacecraft have angular velocity relative to Earth?
space.stackexchange.com
26
How could a hot lander enter Titan's atmosphere without setting its hydrocarbons ablaze?
space.stackexchange.com
25
Can a satellite orbit the ISS?
space.stackexchange.com
24
What is the practical use of passing a Turing test?
worldbuilding.stackexchange.com
24
Is there a puzzle that is only solvable by assuming there is a unique solution?
puzzling.stackexchange.com
24
Did Feynman cite a fallacy about only circles having the same width in all directions as a reason for the Challenger disaster?
space.stackexchange.com
24
Are there any saltwater rivers on Earth?
earthscience.stackexchange.com
24
Pheromone-based language
worldbuilding.stackexchange.com
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