User Anthony X

141 votes

Accepted

Couldn't I escape Earth's gravity traveling only 1 mph (0.45 m/s)?

answered Jun 4, 2014 at 2:40

98 votes

Is it possible for a moon to have a higher surface gravity than the planet it is attached to?

answered Dec 2, 2019 at 16:30

47 votes

Accepted

Why aren't air breathing engines used as small first stages?

answered Apr 16, 2019 at 1:38

42 votes

Accepted

What are the droplets/particles falling off rockets at launch?

answered Nov 9, 2014 at 19:54

39 votes

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ISS Structural Integrity

answered Nov 18, 2017 at 2:21

28 votes

Why did the rendezvous attempt fail on Gemini 4?

answered Oct 20, 2013 at 18:24

28 votes

Is it possible to create a relativistic space probe going at least 0.1c with present day technology?

answered Apr 9, 2020 at 0:51

27 votes

Could the Space Shuttle have landed on any long runway other than those specially reinforced at Kennedy (TTS), and Edwards (EDW)?

answered May 20, 2014 at 0:11

26 votes

What are the reasons Soyuz's lifespan in orbit is limited?

answered Oct 13, 2018 at 15:57

25 votes

Is is possible to generate centrifugal gravity by doing donuts?

answered Nov 27, 2017 at 2:44

24 votes

Why did NASA close the space shuttle program?

answered Aug 13, 2017 at 14:39

21 votes

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Using command module as a lander

answered Oct 22, 2016 at 2:34

20 votes

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In the Saturn V launch sequence, what defined COMMIT, and what happened between COMMIT and LIFTOFF?

answered Aug 14, 2016 at 15:28

18 votes

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Did some of the Shuttle fuel tanks actually orbit?

answered May 10, 2014 at 18:09

17 votes

Accepted

Why does lunar gravity decrease?

answered Nov 23, 2014 at 16:39

16 votes

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Briefly, what are the factors to consider when choosing a launch site?

answered Jan 13, 2015 at 2:32

15 votes

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What is stopping us from starting to terraform Mars right now?

answered Mar 14, 2017 at 1:00

15 votes

Traveling in a circle while in orbit

answered Sep 9, 2017 at 19:37

15 votes

How do we know the Apollo Moon landings are real?

answered Jun 30, 2018 at 20:42

14 votes

Accepted

Is it possible to bring "nothing" back from space?

answered May 21, 2014 at 3:25

13 votes

Did von Braun have "a thing" for fins? Why did Saturn I block 2 get fins because it's a "von Braun" rocket?

answered Aug 18, 2019 at 14:49

12 votes

Do spacecraft have similar structural integrity requirements as submarines?

answered Jun 24, 2014 at 2:23

12 votes

How tall do you have to be to be an astronaut?

answered Jan 30, 2017 at 5:02

11 votes

Why can't plants grow on Mars?

answered Jan 10, 2015 at 15:34

8 votes

Why do ISS astronauts use lower quality microphones for official radio communication than for PR events?

answered Mar 1, 2015 at 15:42

8 votes

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

answered Nov 25, 2013 at 3:55

8 votes

Accepted

Are side boosters sometimes angled even if they are symmetrically arranged?

answered Sep 17, 2018 at 19:24

8 votes

Wouldn't it be better to leave Earth less dramatically?

answered Feb 4, 2018 at 20:15

8 votes

If a spaceship ran out of fuel somewhere in space between Earth and Mars, does it slowly drift off to the Sun?

answered Sep 23, 2019 at 2:42

8 votes

Cheapest rocket to go to space?

answered Feb 23, 2019 at 21:24

Stack Exchange Network

102 Answers

Couldn't I escape Earth's gravity traveling only 1 mph (0.45 m/s)?

Is it possible for a moon to have a higher surface gravity than the planet it is attached to?

Why aren't air breathing engines used as small first stages?

What are the droplets/particles falling off rockets at launch?

ISS Structural Integrity

Why did the rendezvous attempt fail on Gemini 4?

Is it possible to create a relativistic space probe going at least 0.1c with present day technology?

Could the Space Shuttle have landed on any long runway other than those specially reinforced at Kennedy (TTS), and Edwards (EDW)?

What are the reasons Soyuz's lifespan in orbit is limited?

Is is possible to generate centrifugal gravity by doing donuts?

Why did NASA close the space shuttle program?

Using command module as a lander

In the Saturn V launch sequence, what defined COMMIT, and what happened between COMMIT and LIFTOFF?

Did some of the Shuttle fuel tanks actually orbit?

Why does lunar gravity decrease?

Briefly, what are the factors to consider when choosing a launch site?

What is stopping us from starting to terraform Mars right now?

Traveling in a circle while in orbit

How do we know the Apollo Moon landings are real?

Is it possible to bring "nothing" back from space?

Did von Braun have "a thing" for fins? Why did Saturn I block 2 get fins because it's a "von Braun" rocket?

Do spacecraft have similar structural integrity requirements as submarines?

How tall do you have to be to be an astronaut?

Why can't plants grow on Mars?

Why do ISS astronauts use lower quality microphones for official radio communication than for PR events?

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

Are side boosters sometimes angled even if they are symmetrically arranged?

Wouldn't it be better to leave Earth less dramatically?

If a spaceship ran out of fuel somewhere in space between Earth and Mars, does it slowly drift off to the Sun?

Cheapest rocket to go to space?