User geoffc

23 votes

Accepted

Why did the Russians never land on the Moon?

answered Jul 18, 2013 at 12:39

23 votes

What made NASA shut down the Shuttle program?

answered Aug 11, 2013 at 14:37

22 votes

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Why is the first stage from the Falcon 9 SES-12 mission not recovered?

answered May 29, 2018 at 13:09

22 votes

Why doesn't the ISS start to spin if people walk inside?

answered May 7, 2017 at 12:08

22 votes

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Air in International Space Station

answered Sep 4, 2014 at 15:24

22 votes

What would one learn by borescoping a rocket engine after an aborted launch?

answered Mar 30, 2015 at 20:18

22 votes

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Why aren't there any space tugs in use?

answered Dec 12, 2014 at 20:02

21 votes

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Can the Falcon Heavy handle deep space missions?

answered Feb 12, 2018 at 19:40

21 votes

Are SpaceX Falcon rocket boosters significantly cheaper to operate than traditional expendable boosters?

answered Dec 27, 2020 at 1:41

21 votes

Accepted

Why does the Falcon 9 use RP-1/LOx and not LH2/LOx?

answered Jun 13, 2018 at 14:11

21 votes

Were the Apollo lunar activities observed from Earth?

answered Jun 10, 2015 at 12:14

21 votes

Accepted

Will a Dragon v2 ever bring 7 astronauts to the ISS?

answered Aug 7, 2015 at 13:14

21 votes

Why are the very reliable rockets Atlas V and Ariane V not rated for human flight?

answered Jun 12, 2014 at 11:32

21 votes

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How do astronauts and cosmonauts sleep on a Soyuz?

answered Oct 30, 2015 at 11:19

20 votes

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How many spacecraft can dock at the ISS at once?

answered May 11, 2020 at 19:28

20 votes

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Have space station occupants always had a return vehicle ready?

answered Dec 1, 2021 at 20:59

20 votes

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Why is the F9-029 Amos 6 case more complex than the F9-020 CRS-7 explosion?

answered Sep 16, 2016 at 14:06

19 votes

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Is SpaceX doing any science with the Roadster and/or spacesuit?

answered Mar 2, 2018 at 18:03

19 votes

How often do other space vehicles visit the international space station?

answered May 27, 2020 at 21:05

19 votes

Now that they can land a Falcon 9, what will they do with it?

answered Dec 22, 2015 at 14:12

19 votes

Why aren't all satellite-carrying rockets launched from airplanes?

answered Oct 6, 2014 at 11:38

19 votes

Accepted

Why have so few countries developed satellite launching vehicles of their own?

answered Aug 11, 2014 at 13:40

19 votes

How long can Philae stay "alive"?

answered Nov 12, 2014 at 19:55

18 votes

Why did the Falcon Heavy center core fall off the ASDS OCISLY barge?

answered Apr 16, 2019 at 12:59

18 votes

Accepted

With six spacecraft currently docked at the ISS, how could Santa (or anyone else) deliver presents?

answered Dec 9, 2018 at 12:36

18 votes

Does NASA have spacecraft that are specifically made for orbiting around the Sun?

answered Apr 25, 2014 at 2:14

18 votes

Accepted

Will the ISS need more docking ports?

answered Oct 6, 2013 at 19:49

18 votes

Why don't unmanned launch vehicles include launch escape system for payload?

answered Nov 24, 2013 at 20:48

18 votes

What makes Falcon Heavy with 3 booster 4 times more capable than single booster F9?

answered Jan 19, 2015 at 22:36

17 votes

Accepted

What is the two little black side tanks seen at starship?

answered Apr 6, 2020 at 0:11

Stack Exchange Network

671 Answers

Why did the Russians never land on the Moon?

What made NASA shut down the Shuttle program?

Why is the first stage from the Falcon 9 SES-12 mission not recovered?

Why doesn't the ISS start to spin if people walk inside?

Air in International Space Station

What would one learn by borescoping a rocket engine after an aborted launch?

Why aren't there any space tugs in use?

Can the Falcon Heavy handle deep space missions?

Are SpaceX Falcon rocket boosters significantly cheaper to operate than traditional expendable boosters?

Why does the Falcon 9 use RP-1/LOx and not LH2/LOx?

Were the Apollo lunar activities observed from Earth?

Will a Dragon v2 ever bring 7 astronauts to the ISS?

Why are the very reliable rockets Atlas V and Ariane V not rated for human flight?

How do astronauts and cosmonauts sleep on a Soyuz?

How many spacecraft can dock at the ISS at once?

Have space station occupants always had a return vehicle ready?

Why is the F9-029 Amos 6 case more complex than the F9-020 CRS-7 explosion?

Is SpaceX doing any science with the Roadster and/or spacesuit?

How often do other space vehicles visit the international space station?

Now that they can land a Falcon 9, what will they do with it?

Why aren't all satellite-carrying rockets launched from airplanes?

Why have so few countries developed satellite launching vehicles of their own?

How long can Philae stay "alive"?

Why did the Falcon Heavy center core fall off the ASDS OCISLY barge?

With six spacecraft currently docked at the ISS, how could Santa (or anyone else) deliver presents?

Does NASA have spacecraft that are specifically made for orbiting around the Sun?

Will the ISS need more docking ports?

Why don't unmanned launch vehicles include launch escape system for payload?

What makes Falcon Heavy with 3 booster 4 times more capable than single booster F9?

What is the two little black side tanks seen at starship?