Linked Questions

32 votes
5 answers
9k views

Can you turn in space without propulsion?

Say an astronaut is floating perfectly still inside their spaceship. Can they rotate themselves by stretching out their arms and twisting one way, then pulling in their arms to their sides and ...
Innovine's user avatar
  • 4,635
20 votes
3 answers
4k views

How best to maneuver inside a large room within a space station using only arm and leg motion?

Imagine the following thought experiment: An astronaut is inside an extremely large room within a space station. Suppose that she, for whatever reason, is initially at a zero velocity with respect ...
Paul's user avatar
  • 2,004
17 votes
6 answers
4k views

Would a higher air pressure on the ISS or elsewhere make it easier to "swim" in microgravity?

What if the atmospheric pressure onboard the ISS was 5 atm, 5 times the pressure on Earth and currently on the ISS, while maintaining the breathable oxygen level, e.g. if the additional atmosphere ...
LoveForChrist's user avatar
43 votes
2 answers
19k views

Can fish really live in microgravity without water?

Yes, you read that title correctly. I saw the claim in "Colonies in Space", hosted on the NSS site. In a weightless space farm, it may be possible to raise fish without water. On Earth, when a ...
AlanSE's user avatar
  • 16.4k
16 votes
3 answers
16k views

Can you swim in space?

My wife shared this picture with me today: Adorable, but it got me thinking about that trope - swimming in space. I've seen it before, mostly in cartoons and not live-action shows, the latter of ...
Zibbobz's user avatar
  • 262
7 votes
2 answers
2k views

What's the specific impulse of a human farts/urination?

I was curious about how effective farting/urination would be as a propulsion system, but I couldn't find any data on the specific impulse of human farts/urination. Could you actually get a couple of ...
Markus Klyver's user avatar
2 votes
3 answers
2k views

Can a human body change direction when floating in a space without gravity?

Suppose I am in the center of a hypothetical 4mx4m room and there is no gravity. I am wearing a spacesuit with no means of propulsion (e.g. venting, ejecting, etc..). Would I be able to reach "the ...
Yaza Fatutu's user avatar
11 votes
1 answer
674 views

Can (human) gas propel someone in a contained space station?

I am NOT trying to be lewd, but I had a student ask this. Yes, she may have been tongue-in-cheek, but I promised to answer her. And yes, I am trying to keep this as practical as possible. If and ...
Mikey's user avatar
  • 2,941
1 vote
1 answer
404 views

Can an astronaut stand at attention in the ISS?

Am I correct in assuming it is near impossible for astronauts to stand still inside the ISS, even if their feet are secured under a blue IVA rail? NASA astronauts Terry Virts' foot under a blue IVA ...
Bob516's user avatar
  • 6,999
3 votes
1 answer
171 views

What is the acceleration in an orbit decaying due to air resistance relative to one not decaying?

This answer to Is there an upper limit for the internal size of space stations? has this paragraph: Finally, if you are stuck ["stranded" in the middle of a room in a space station filled ...
Matthew Christopher Bartsh's user avatar
0 votes
1 answer
175 views

What is the difference between "body drag", "frictional drag" and "pressure drag" for astronaut or aerobot atmospheric locomotion in microgravity?

Complaints below my answer to Would a higher air pressure on the ISS or elsewhere make it easier to “swim” in microgravity? about my spherical-cow estimate of how fast an astronaut can accelerate by &...
uhoh's user avatar
  • 149k