JED3

Actually most of you have it wrong here. Saying my clock goes slower than yours if I am traveling faster than you is silly...think about it. (A person flying by Earth at 3/4 the speed of light in a rocket, for example.) From his view in the rocket, Earth is traveling past him at 3/4 C. Speed is relative. It only matters if you "leave" Earth and her time frame, travel from "her" at a high relative rate of speed, and return to her again. In this example, you exist now at a younger age than all people you knew when you left. They might even be dead and gone many years. It is not your "speed' that caused this because, again, your speed to Earth was the same as Earth's speed to you. Speed is relative....completely. What caused you to slow in time was your "Acceleration" Or simply put, your "change" in speed There is a company called "The Teaching Company. They sell DVD courses on every main college subject. The courses are not credited, though they are given by the best professors in the world. Get "Einstein's Relativity and the Quantum Revolution," Professor Richard Wolfson. It is awesome! It answers all these questions and more. Good Luck to all. John jed3