I remember doing a physics problem in college that demonstrated that if you compared an object moving through space at close to the speed of light with an object standing still on earth, time on earth would advance at a much faster pace than it would for the object traveling at such a high speed in space. So lets say hypotheticaly An object moving at the edge of light speed moves away from the earth for 2 years and then returns home, thats 4 years total. In that 4 year time frame many hundreds even thousands of years may have passed on earth. Does anyone know the mathematical formula for solving this problem ? If so could you explain it to me because I have forgotten how to do it over the years.

:)

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