(March 1, 2012 at 10:09 am)chipan Wrote: You obviously don't know about it. Speed and black holes are the only things that effect time? Tell me why are our satellite clocks fast compared to earth clocks? Come on. It's because gravity effects time too. Not limited to black holes though they do have the most gravity and thus would slow time down more.
For anyone that cares except chiapet, velocity and gravity ARE the only two things that effect time and in a sense it is only velocity. By saying that (and I know it isn't strictly correct), the reasoning is that the satellites in LEO are in freefall. Someone else can do the math if they want but the force of gravity really isn't that much different from the surface in LEO. That is also why astronauts in LEO are weightless.