User Russell Borogove

195 votes

Accepted

Apollo image lighting

the-moon apollo-program

answered Oct 24, 2019 at 3:39

175 votes

Accepted

Who was the first human to sleep - perchance to dream - on the Moon?

answered Nov 13, 2019 at 18:27

125 votes

Accepted

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

launch rockets payload escape-velocity performance

answered Jul 30, 2016 at 20:53

104 votes

Accepted

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

space-shuttle shuttle-carrier-aircraft

answered Sep 14, 2017 at 0:14

99 votes

Accepted

Why did some Apollo missions carry a grenade launcher?

apollo-program explosives

answered Jul 29, 2019 at 15:06

99 votes

Accepted

What was Apollo 13's "Little Jolt" after MECO?

launch apollo-program apollo-13

answered Apr 23, 2019 at 15:18

98 votes

Why is it so hard to land on the Moon?

the-moon lunar-landing

answered Oct 1, 2019 at 23:26

93 votes

Accepted

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

spacecraft voyager

answered Dec 7, 2020 at 4:27

93 votes

How did people know how to build the first space ship?

spacecraft history

answered Aug 9, 2017 at 19:47

89 votes

Accepted

Has alcohol ever been consumed in space?

food trivia

answered Dec 16, 2018 at 4:48

83 votes

Accepted

Why do space operations use "nominal" to mean "working correctly"?

terminology

answered Jul 17, 2019 at 16:55

82 votes

Accepted

Is it true that NASA is hiring a new 'planetary protection officer'?

nasa planetary-science earth planetary-protection

answered Aug 3, 2017 at 12:28

81 votes

Accepted

Why not build Saturn V's again?

apollo-program cost saturn-v sls orion-spacecraft

answered Dec 9, 2014 at 17:29

78 votes

Accepted

How did the Lunar Module dock with the rest of Apollo 11 and what is the "CSM"?

orbital-mechanics the-moon apollo-program history docking

answered Sep 10, 2017 at 1:08

76 votes

Accepted

Why is the ladder of the LM always in the dark side of the LM?

lunar-landing lunar-module

answered Jul 7, 2019 at 21:39

74 votes

Accepted

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

history fuel soviet-union sputnik

answered Jul 16, 2019 at 1:39

74 votes

Accepted

Has any human ever had the choice to leave Earth permanently?

escape-velocity humans soi

answered Feb 25, 2019 at 18:44

74 votes

Accepted

Did a Soyuz fly with a Union Jack?

identify-this-object soyuz-launcher soviet-union

answered Sep 26, 2018 at 3:06

72 votes

Accepted

How did the Apollo Lunar Module ascent engine prevent gas bubbling through fuel?

apollo-program engines helium

answered May 31, 2017 at 20:03

70 votes

Where does space begin on planets without atmospheres?

orbit karman-line

answered Aug 5, 2018 at 19:25

69 votes

Accepted

How did NASA choose who descended in the LEM during the Apollo missions?

apollo-program apollo-11

answered Sep 24, 2017 at 23:46

68 votes

Why are we trying to prevent life from spreading via landers rather than actively encouraging it?

astrobiology

answered Jul 27, 2021 at 19:54

66 votes

Accepted

Why can't we use the same radiation shielding in Mars that we used when going to the moon?

mars crewed-spaceflight colonization radiation shielding

answered Jun 21, 2017 at 17:27

65 votes

Accepted

Can a miniature Saturn V get to the moon and back?

launch rockets delta-v

answered Jan 27, 2016 at 7:26

65 votes

Accepted

Is the Skylab 4 mutiny just a myth?

astronauts myth-busting skylab

answered Jun 15, 2020 at 0:39

64 votes

Would it be practical to catch a rocket's exhaust to reuse it as fuel?

rockets fuel design-alternative

answered Jul 1, 2021 at 16:03

64 votes

Why do astronauts wear spacesuits during launch?

launch crewed-spaceflight spacesuits

answered Apr 26, 2021 at 5:47

63 votes

Was not saving the Apollo 13 astronauts ever considered as an option?

apollo-13

answered Mar 19, 2020 at 16:31

62 votes

Accepted

Could a Falcon 9 reach orbit with a person glued to the outside of it?

launch rockets

answered Jul 15, 2021 at 0:53

61 votes

How much stronger does gravity have to be for space travel to be impossible?

rockets gravity

answered Jan 11, 2020 at 16:47

Stack Exchange Network

current community

your communities

more stack exchange communities

1,261 Answers

Apollo image lighting

Who was the first human to sleep - perchance to dream - on the Moon?

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

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

Why did some Apollo missions carry a grenade launcher?

What was Apollo 13's "Little Jolt" after MECO?

Why is it so hard to land on the Moon?

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

How did people know how to build the first space ship?

Has alcohol ever been consumed in space?

Why do space operations use "nominal" to mean "working correctly"?

Is it true that NASA is hiring a new 'planetary protection officer'?

Why not build Saturn V's again?

How did the Lunar Module dock with the rest of Apollo 11 and what is the "CSM"?

Why is the ladder of the LM always in the dark side of the LM?

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

Has any human ever had the choice to leave Earth permanently?

Did a Soyuz fly with a Union Jack?

How did the Apollo Lunar Module ascent engine prevent gas bubbling through fuel?

Where does space begin on planets without atmospheres?

How did NASA choose who descended in the LEM during the Apollo missions?

Why are we trying to prevent life from spreading via landers rather than actively encouraging it?

Why can't we use the same radiation shielding in Mars that we used when going to the moon?

Can a miniature Saturn V get to the moon and back?

Is the Skylab 4 mutiny just a myth?

Would it be practical to catch a rocket's exhaust to reuse it as fuel?

Why do astronauts wear spacesuits during launch?

Was not saving the Apollo 13 astronauts ever considered as an option?

Could a Falcon 9 reach orbit with a person glued to the outside of it?

How much stronger does gravity have to be for space travel to be impossible?