User DarkDust

80 votes

Accepted

How did the Russians get moon rocks?

answered Jul 3, 2018 at 12:16

69 votes

Accepted

SpaceX merlin engine failure

spacex merlin-1d

answered Feb 21, 2018 at 11:57

67 votes

Why can't they just drop a solar winch down from a shuttle and have planes fly up and clip things on?

spacecraft design space-elevator design-alternative

answered Jan 20, 2019 at 8:27

66 votes

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

launch falcon-heavy payload tesla-roadster nonstandard-payload

answered Feb 4, 2018 at 17:41

59 votes

Accepted

Assuming a spacecraft is traveling in a constant rate and our Astronaut will exit it to a space walk, will she be "left behind" by the spacecraft?

spacecraft interplanetary eva

answered Nov 8, 2018 at 13:24

44 votes

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How did humans grow plants on the Moon despite the harsh conditions?

the-moon life life-support chang-e

answered Jan 16, 2019 at 12:03

39 votes

Why does the ISS have to be destroyed?

iss deorbit

answered Jan 10, 2018 at 14:30

36 votes

Did Apollo have braking rockets for soft landing on Earth?

apollo-program landing

answered Sep 27, 2020 at 9:00

30 votes

Have there ever been people trapped in a shut down spacecraft?

crewed-spaceflight history astronauts

answered Dec 4, 2018 at 11:55

29 votes

Accepted

Have any astronauts/cosmonauts died in space?

astronauts failure death high-earth-orbit

answered Mar 18, 2019 at 15:34

27 votes

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How come we don’t put a huge windmill-like machine in space?

energy vacuum rotation

answered Jul 13, 2018 at 20:13

24 votes

Do astronauts live longer than earthlings?

astronauts

answered Jul 19, 2018 at 10:38

23 votes

Pictures from Mars

mars communication rovers interplanetary

answered Feb 19, 2019 at 10:31

23 votes

Is oxygen present in the sun?

oxygen the-sun

answered Aug 18, 2017 at 13:07

20 votes

Accepted

Have astronauts in space suits ever taken selfies? If so, how?

astronauts photography space-art astronaut-lifestyle

answered Apr 6, 2019 at 7:52

18 votes

Accepted

Why has SpaceX changed Starship from carbon fiber composite to stainless steel?

spacex materials upper-stage spacex-starship composite-materials

answered Dec 29, 2018 at 11:16

17 votes

Did Apollo leave poop on the moon?

the-moon apollo-program astronaut-lifestyle waste

answered Aug 7, 2019 at 7:02

16 votes

How many countries have sent personnel to the ISS?

iss astronauts

answered Jan 10, 2017 at 14:03

15 votes

Accepted

What was the colour of the shoes used by the Apollo astronauts in moon landing?

nasa apollo-program astronauts apollo-11 moonwalking

answered Dec 9, 2018 at 16:54

14 votes

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Is the Starlink array really visible from Earth?

spacex low-earth-orbit visibility-of-spacecraft starlink

answered May 25, 2019 at 14:31

13 votes

Has any spacecraft ever been flown manually to orbit?

launch

answered Jan 12, 2019 at 8:21

12 votes

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Ribbed rocket nozzles

rockets design engine-design nozzle

answered Feb 11, 2017 at 20:16

12 votes

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Largest inhabitable volume in space

spacecraft history space-station life

answered Dec 18, 2016 at 18:02

11 votes

What are the consequences if an astronaut's helmet gets damaged during a spacewalk?

astronauts health eva failure

answered Jul 2, 2016 at 19:34

11 votes

How does the propellant flow during descent on SpaceX's Falcon 9 first stage?

spacex reentry turbopump

answered Mar 5, 2017 at 13:55

10 votes

Objects that have been on the Moon multiple times

the-moon apollo-program equipment apollo-17

answered Oct 3, 2019 at 14:12

9 votes

Accepted

Why do Soviet and Soviet-derived rockets hot-stage instead of using ullage motors?

rockets design soviet-union stage-separation ullage

answered Jan 30, 2020 at 17:46

9 votes

Accepted

What does "all systems are internal" mean?

apollo-program launch-sequence project-gemini

answered Aug 22, 2020 at 5:46

9 votes

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

flight-computer

answered Jul 16, 2021 at 12:08

9 votes

Why does the Falcon Heavy Rocket have a higher payload than the Space Shuttle?

launch spacex space-shuttle falcon-heavy

answered Feb 3, 2018 at 19:50

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48 Answers

How did the Russians get moon rocks?

SpaceX merlin engine failure

Why can't they just drop a solar winch down from a shuttle and have planes fly up and clip things on?

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

Assuming a spacecraft is traveling in a constant rate and our Astronaut will exit it to a space walk, will she be "left behind" by the spacecraft?

How did humans grow plants on the Moon despite the harsh conditions?

Why does the ISS have to be destroyed?

Did Apollo have braking rockets for soft landing on Earth?

Have there ever been people trapped in a shut down spacecraft?

Have any astronauts/cosmonauts died in space?

How come we don’t put a huge windmill-like machine in space?

Do astronauts live longer than earthlings?

Pictures from Mars

Is oxygen present in the sun?

Have astronauts in space suits ever taken selfies? If so, how?

Why has SpaceX changed Starship from carbon fiber composite to stainless steel?

Did Apollo leave poop on the moon?

How many countries have sent personnel to the ISS?

What was the colour of the shoes used by the Apollo astronauts in moon landing?

Is the Starlink array really visible from Earth?

Has any spacecraft ever been flown manually to orbit?

Ribbed rocket nozzles

Largest inhabitable volume in space

What are the consequences if an astronaut's helmet gets damaged during a spacewalk?

How does the propellant flow during descent on SpaceX's Falcon 9 first stage?

Objects that have been on the Moon multiple times

Why do Soviet and Soviet-derived rockets hot-stage instead of using ullage motors?

What does "all systems are internal" mean?

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

Why does the Falcon Heavy Rocket have a higher payload than the Space Shuttle?