One of the consequences of Albert #Einstein’s general theory of #relativity is #time dilation; time differs for two observers that are either moving or are positioned differently with respect to a gravitational mass. Because of time dilation, the #clocks on #satellites or on the International Space Station will naturally diverge from the timekeeping of a clock on #Earth. #PhotoOfTheDay #science #ISS #NASA #clock #gravity 📷 @nasa