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.
Light travels through space at just over 186,000 miles per second. The moon is just under 250,000 miles from Earth, so light from the Moon's surface has to travel more than one second (about 1.3 seconds) to reach us. Among other things, the astronauts left reflecting mirrors on the moon.