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How many hours long is Earth's longest possible sub-orbital flight? "Orbit", and thus "orbital" and "sub-orbital" is another one of those words like "rocket" whose definition alters significantly with context. Any trajectory under gravitational influence and not dominated by atmospheric influence can be considered an "orbit", but here at S.SX we usually ...


3

No. Nothing is actually stationary and everything is in motion. You can appear stationary but that is an optical illusion. Ships and fleets in sci-fi shows look still but in reality they would most certainly be in some kind of motion. You slow down too much in space and you begin to speed up to the largest closest gravity well near by.


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