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Mar20-03, 08:41 PM
P: n/a
You can only observe time dilation in a frame different than yours, whether it is because of gravity or because of motion. Problem with interpreting the time dilation as a difference in simultaneity is that you can actually travel to the future and to the past, depending on your frame. If in your frame, the year is 2003 but in the other frame, the year is 2103, when you travel to the other frame, you should have aged 100 years, but once you go back to the other frame, you would become 100 years younger. That's pretty retarded.