Outline what prevents the hubble telescope from falling back into the earth orbit?

Answer 1

The service call Columbia provide a 36 mins boost to move Hubble's orbit by about 6km. Without a boost, Hubble and other satellites would fall back into earth's atmosphere, burning up on re-entry.

Answer 2

The Hubble Space Telescope's orbit is stable due to its high velocity, which allows it to remain in space despite Earth's gravitational pull. Additionally, there is no atmospheric drag in space to slow it down. Periodic boosts from its onboard thrusters help maintain its altitude and counteract any potential orbital decay.