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Top Questions
52 votes

Did a Soyuz fly with a Union Jack?

identify-this-object soyuz-launcher soviet-union asked Sep 26, 2018 at 3:04
space.stackexchange.com

49 votes

Why is there a Saturn V in the background of this Gemini-Titan launch?

apollo-program identify-this-object saturn-v project-gemini asked Mar 28, 2020 at 15:34
space.stackexchange.com

32 votes

Were cosmonauts equipped with poison pills?

cosmonaut spacewalk leonov asked Aug 11, 2017 at 0:17
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32 votes

Has in-space refueling been done?

apollo-program propulsion docking rendezvous refueling asked Jul 22, 2015 at 15:48
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29 votes

Why no parachutes in the Orion AA2 abort test?

testing abort orion-spacecraft recovery parachute asked Jul 2, 2019 at 18:25
space.stackexchange.com

26 votes

What makes the Merlin vacuum engine so deeply throttleable?

spacex falcon-9 engines asked Nov 29, 2015 at 18:38
space.stackexchange.com

23 votes

How does SpaceX plan to achieve reusability of the Falcon 9 *second* stage?

falcon-9 reuse asds merlin-1d kestrel asked Jul 31, 2015 at 4:25
space.stackexchange.com

23 votes

How intrusive was the Apollo Master Alarm system?

apollo-program lunar-landing safety asked Nov 8, 2015 at 19:03
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21 votes

Could an Apollo LM land uncrewed?

apollo-program lunar-landing uncrewed-spaceflight asked May 24, 2017 at 15:17
space.stackexchange.com

21 votes

Were any Apollo-13-specific procedures added to standard training?

apollo-program apollo-13 training asked Apr 16, 2020 at 22:03
space.stackexchange.com

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Top Answers
325
How do I define a function with optional arguments?
stackoverflow.com

199
Apollo image lighting
space.stackexchange.com

179
Who was the first human to sleep - perchance to dream - on the Moon?
space.stackexchange.com

156
How much bigger could Earth be, before rockets wouldn't work?
space.stackexchange.com

108
Detect tap with pyaudio from live mic
stackoverflow.com

107
Is this "Attach Orbiter Here / Note: Black Side Down" sign on the Shuttle Carrier Aircraft real?
space.stackexchange.com

102
What was Apollo 13's "Little Jolt" after MECO?
space.stackexchange.com

99
Why did some Apollo missions carry a grenade launcher?
space.stackexchange.com

98
Why is it so hard to land on the Moon?
space.stackexchange.com

93
Why do exploration spacecraft like Voyager 1 and 2 go through the asteroid belt, and not over or below it?
space.stackexchange.com

93
How did people know how to build the first space ship?
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89
Has alcohol ever been consumed in space?
space.stackexchange.com

85
Why do space operations use "nominal" to mean "working correctly"?
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82
Is it true that NASA is hiring a new 'planetary protection officer'?
space.stackexchange.com

82
Why not build Saturn V's again?
space.stackexchange.com

81
How did the Lunar Module dock with the rest of Apollo 11 and what is the "CSM"?
space.stackexchange.com

79
Python's "open()" throws different errors for "file not found" - how to handle both exceptions?
stackoverflow.com

78
Split string every nth character
stackoverflow.com

77
Why is the ladder of the LM always in the dark side of the LM?
space.stackexchange.com

75
Has any human ever had the choice to leave Earth permanently?
space.stackexchange.com

75
Did a Soyuz fly with a Union Jack?
space.stackexchange.com

74
What "fuel more powerful than anything the West (had) in stock" put Laika in orbit aboard Sputnik 2?
space.stackexchange.com

72
How did the Apollo Lunar Module ascent engine prevent gas bubbling through fuel?
space.stackexchange.com

71
Where does space begin on planets without atmospheres?
space.stackexchange.com

70
Why are we trying to prevent life from spreading via landers rather than actively encouraging it?
space.stackexchange.com

69
How did NASA choose who descended in the LEM during the Apollo missions?
space.stackexchange.com

67
Is the Skylab 4 mutiny just a myth?
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66
Would it be practical to catch a rocket's exhaust to reuse it as fuel?
space.stackexchange.com

66
Why can't we use the same radiation shielding in Mars that we used when going to the moon?
space.stackexchange.com

65
Can a miniature Saturn V get to the moon and back?
space.stackexchange.com

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