M
Morningkill
Guest
Just to be pedantic - at most of the distances from the earth involved in space missions (certainly orbits) it’s not technically speaking zero gravity. The gravity is very real and very perceptible - it is merely that EVERYTHING (shuttle, astronaunts, Sacred Species) etc. are all falling at the same speed. It is a simulation of zero-gravity, but gravity is very real.
If there were truly no gravity from the earth at those distances, then there would be no risk of a ship getting pulled into the earth’s gravity well. But there is a very real risk of that - this is why objects have to be moving at a fair lick when they are in orbit. An orbit is a compromise between flying off into space and falling to towards another object - a compromise which happens to be simply spinning around.
An object at the distance of a standard orbit with no additional forces acting on it except gravity would be sucked to earth.
If there were truly no gravity from the earth at those distances, then there would be no risk of a ship getting pulled into the earth’s gravity well. But there is a very real risk of that - this is why objects have to be moving at a fair lick when they are in orbit. An orbit is a compromise between flying off into space and falling to towards another object - a compromise which happens to be simply spinning around.
An object at the distance of a standard orbit with no additional forces acting on it except gravity would be sucked to earth.