Tagged Questions
4
votes
2answers
98 views
What is the fastest a spacecraft can get using gravity-assist?
Assuming normal spacecraft and space objects (no neutron stars, black holes, etc). To what speed can a spacecraft accelerate using gravity-assist?
For example, if a spacecraft is moving at ...
3
votes
5answers
387 views
If a space ship accelerated constantly, would its astronauts constantly feel the forward movement?
I know that if a space ship suddenly traveled very fast, its astronauts would be fly against the back wall, potentially getting hurt. If the space ship suddenly stopped, they would also fly against ...
2
votes
2answers
189 views
Spaceships travelling through space and debris
How can a spaceship travel through space if there is space debris flying around at very high speeds?
Wouldn't even a small rock crack through the spaceship?
3
votes
1answer
96 views
What's wrong with this reactionless drive?
I think this is analogues for the Woodward effect, but macroscopic:
We assume a spacecraft consisting of a broomstick, a donut and lots of gear for storing and transfering mechanical energy.
Take the ...
5
votes
4answers
715 views
Why can't a spaceship accelerate for ever? Since there is no friction in space
I have seen many answers like: because we don't have infinite energy, because of gravity, because it is impossible, because of physics.
But they don't really answer my question.. I mean if there is ...
5
votes
3answers
762 views
How do they produce air on the ISS?
How do they provide air on the ISS? I know it is produced by electrolysis but is that all they breathe, hydrogen and oxygen? The air here on Earth contains other things like nitrogen. Do the people ...
1
vote
2answers
147 views
Get into orbit from the Redbull jump position to a satellite position by using a cord/rope?
Its difficult to put this into the title.
I was watching the Redbull Jump and noticed that the height of this is at 39 kilometres (24 mi) the atmosphere pressure is at I believe about 0.4% of that at ...
4
votes
3answers
298 views
What Problems for 50 year space probe to Alpha Centauri?
I'm thinking speculatively. NASA is doing experiment with ion thrust tech. Assuming, that inside the next 5 years, we could create a probe which would take on the order of 30 to 50 years to reach ...
10
votes
3answers
121 views
Why are spacecraft made to “spin” after launch?
At some point after launch, usually just before or after separation from the last booster stage, spacecraft are often made to "spin" (about the axis of their trajectory)? See e.g this You Tube video. ...
