Tagged Questions
2
votes
1answer
51 views
Oberth Effect in deep space
Does the Oberth effect only apply when in orbit of a planet or would a rocket generate more and more thrust (if kept on) even in deep space?
Wikipedia explains that the faster the rocket goes, the ...
3
votes
2answers
85 views
Orbit in the vacuum
As the space is a vacuum and there is no friction in space,
Can we assume that, if we place an object in gravity in exactly the right distance from a planet with gravity and in the right acceleration, ...
3
votes
2answers
230 views
Consequences of destroying a space elevator
Suppose there is a fully functional space elevator built on Earth. The base is attached to coordinates
$
(\lambda, \varphi) = (0,0)
$
e.g., on the equator on the zero-meridian.
What would happen ...
6
votes
1answer
562 views
What happened to Apollo's Saturn-third-stage rockets?
I read recently the original Apollo 11 press release and it mentions that the Saturn V's third stage (used for Trans-Lunar Injection) was deployed into a solar orbit of some kind:
I know that on ...
6
votes
1answer
203 views
Is there a “map” of the interplanetary transport network?
To my understanding, the idea behind the interplanetary transport network is that areas near heavy objects and their Lagrange points are accesible with comparatively little energy, for example one ...
19
votes
1answer
708 views
Why does it take so long to get to the ISS?
I don't understand why when first launched Space X's Dragon capsule had to orbit the Earth many times in order to match up with the ISS? Was this purely to match it's speed, or to get closer (as in ...
0
votes
2answers
81 views
On constancy of cometary orbits
how are the comets able to keep to a nearly fixed orbital period, though they lose a certain amount of mass during their perihelion?
1
vote
1answer
85 views
More efficient far-future means of keeping the earth alive? [closed]
In about 7 Billion years our planed will be consumed by the ever-growing sun, life would have become extinct long before that. That means that in several hundred thousand years we have a deadline to ...
3
votes
1answer
157 views
Know altitude and speed of an object in orbit, with true anomaly
I'm quite stuck with this problem.
I know that I have an object in orbit. I know the eccentricity of that orbit, as well as the semi-major axis of the orbit.
Giving a true anomaly, how do I find ...
2
votes
1answer
789 views
What are the temperatures of objects in Low Earth Orbit (LEO)?
What is the temperature of objects in Low Earth Orbit?
Consider LEO to be 600km to 800km.
