User David Hammen

136 votes

Why did it take so long to notice that the ozone layer had holes in it? Which satellite provided the data?

answered Jan 11, 2021 at 18:50

77 votes

Why is the breathing atmosphere of the ISS a standard atmosphere (at 1 atm containing nitrogen)?

answered Oct 24, 2014 at 15:46

71 votes

Accepted

Name for geostationary orbit around another planet

answered Nov 29, 2019 at 22:37

69 votes

If human space travel is limited by the G force vulnerability, is there a way to counter G forces?

answered Apr 3, 2019 at 14:26

65 votes

Why is the American space program launch site based in Florida and not Texas?

answered Dec 9, 2016 at 2:13

62 votes

Why destroy Juno at the end of the mission?

answered Jul 5, 2016 at 5:24

60 votes

What makes Ada the language of choice for the ISS's safety-critical systems?

answered Jun 3, 2019 at 12:10

59 votes

Accepted

What language is software running on the ISS written in?

answered Jun 3, 2019 at 4:29

57 votes

Accepted

Why isn't SpaceX's Starship "trial and error" development strategy an open source project?

answered Jan 26, 2021 at 5:22

55 votes

Accepted

What causes microgravity (i.e. non-zero gravity) in orbit?

answered Mar 6, 2014 at 13:38

54 votes

How much has fuel efficiency increased in rockets since the Apollo missions?

answered Nov 11, 2021 at 13:50

54 votes

Accepted

Why not explore Cruithne?

answered Feb 18, 2020 at 15:47

54 votes

Could the Columbia crew have survived if the RCS had not been depleted?

answered Apr 5, 2021 at 13:17

51 votes

Why is the first launch of Falcon Heavy sending a car instead of something useful?

answered Feb 4, 2018 at 18:42

50 votes

Accepted

Why were Space Shuttle astronauts able to walk off the orbiter?

answered Apr 28, 2015 at 10:40

49 votes

Why is it assumed that space flights have to be safe?

answered Jul 4, 2022 at 7:36

49 votes

Accepted

Why do we only use Soyuz to send humans to the ISS?

answered May 27, 2018 at 23:43

47 votes

Can I borrow a lunar rover?

answered Feb 19, 2015 at 5:44

44 votes

Accepted

Are there any weapons in space?

answered Mar 17, 2014 at 13:47

42 votes

Accepted

Why are eclipses of the James Webb by the Earth or Moon not permitted during the mission?

answered Dec 3, 2021 at 19:30

41 votes

Accepted

Why is this Planet Labs video wobbly?

answered Jan 17, 2022 at 14:43

41 votes

Since L2 has no visible marker, how will James Webb's ground control determine its relative position and velocity for station keeping?

answered Jan 27, 2022 at 11:29

41 votes

Why do spacecraft have small RAM? Which spacecraft had the largest memory?

answered Jul 16, 2021 at 13:34

41 votes

Finned heatsinks in space

answered May 20, 2020 at 0:00

40 votes

Accepted

What are some of the obsolete technologies that space agencies used in day-to-day work during the 1960s?

answered Apr 20, 2022 at 12:23

39 votes

Accepted

Ultimate fate of rocket propellant in space?

answered Mar 28, 2022 at 9:11

39 votes

Accepted

Why is there a "coasting" phase in some space launches?

answered Apr 4, 2014 at 13:02

39 votes

Accepted

Why did SpaceX choose to use Hydrazine over newer "green" propellants for Dragon 2?

answered Mar 9, 2015 at 0:02

38 votes

Accepted

Why do Space X starship launches need permission from the FAA?

answered Feb 2, 2021 at 10:12

37 votes

Does a satellite naturally turn in phase with its orbit, always facing Earth?

answered May 4, 2014 at 13:22

Stack Exchange Network

639 Answers

Why did it take so long to notice that the ozone layer had holes in it? Which satellite provided the data?

Why is the breathing atmosphere of the ISS a standard atmosphere (at 1 atm containing nitrogen)?

Name for geostationary orbit around another planet

If human space travel is limited by the G force vulnerability, is there a way to counter G forces?

Why is the American space program launch site based in Florida and not Texas?

Why destroy Juno at the end of the mission?

What makes Ada the language of choice for the ISS's safety-critical systems?

What language is software running on the ISS written in?

Why isn't SpaceX's Starship "trial and error" development strategy an open source project?

What causes microgravity (i.e. non-zero gravity) in orbit?

How much has fuel efficiency increased in rockets since the Apollo missions?

Why not explore Cruithne?

Could the Columbia crew have survived if the RCS had not been depleted?

Why is the first launch of Falcon Heavy sending a car instead of something useful?

Why were Space Shuttle astronauts able to walk off the orbiter?

Why is it assumed that space flights have to be safe?

Why do we only use Soyuz to send humans to the ISS?

Can I borrow a lunar rover?

Are there any weapons in space?

Why are eclipses of the James Webb by the Earth or Moon not permitted during the mission?

Why is this Planet Labs video wobbly?

Since L2 has no visible marker, how will James Webb's ground control determine its relative position and velocity for station keeping?

Why do spacecraft have small RAM? Which spacecraft had the largest memory?

Finned heatsinks in space

What are some of the obsolete technologies that space agencies used in day-to-day work during the 1960s?

Ultimate fate of rocket propellant in space?

Why is there a "coasting" phase in some space launches?

Why did SpaceX choose to use Hydrazine over newer "green" propellants for Dragon 2?

Why do Space X starship launches need permission from the FAA?

Does a satellite naturally turn in phase with its orbit, always facing Earth?