Can a rocket keep moving forever in outer space even if its no longer using fuel?
Answers
Explanation:
the rocket would continue at a constant velocity (given that gravity is nearly non-existent in the proximity of the rocket). However, gravity is present everywhere in the universe. Granted, in some areas of space you can find nearly flat spacetime, but would the rocket continue on forever at a constant velocity? Probably not. As the rocket continues on it journey it will at some future point interact with space-time that is more significantly curved (gravitation) and that will result in a change in the rocket's velocity.
Answer:
But like the rest of us, the International Space Station is aging. And it can't stay in orbit on its own indefinitely — it needs a regular boost or fuel injection from visiting spacecraft. If those boosts stop or something else goes wrong, sooner or later, the lab will fall.