The definition of disability under Social Security is different than other programs. Social Security pays only for total disability. No benefits are payable for partial disability or for short-term disability. We consider you disabled under Social Security rules if: You cannot do work that you did before;
UCSB Science Line. A rocket ship, on its way to the moon, can get up to almost 25,000 miles per hour in order to escape the Earths atmosphere. However, it does not go that fast the whole way. Also, the ship cannot fly directly from the Earth straight to the moon surface.
Rockets can get you going much faster. The first spacecraft to make the run was the Soviet Luna 1 probe. It completed a flyby in 1959. Luna 1 wasn't trying to get into orbit. It was there to whiz past the Moon and take a few pictures as it went. It completed the journey in only 36 hours, traveling at a speed of 10,500 kilometers per hour.