Quote:
Originally Posted by Bigsmoothlee
Time is relative to mass and speed. Mass slows time, for example our GPS satellites run a billionth of a second faster than here on earth and have to be compensated for.
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And meanwhile we have to compensate for the Earth’s rotation slowing down (on-average) approximately 252 milliseconds a year. Ever heard of a Leap Second? I was on a national committee that was asked about leap seconds and how it would impact our systems. I said, “How about waiting 120 years and do a leap minute?” back then everyone laughed but they are not laughing now. After doing 25 Leap Seconds over the past 40 years, and causing significant pain on some complex systems recently, the International Earth Rotation and Reference Systems Service might be coming to their senses and have held-off doing any more Leap Seconds (for now).
So eventually the Earth will stop rotating, what will time be then? And to think this will happen way before the sun decides to expand 250 times.
Leap second - Wikipedia, the free encyclopedia
Gravity… What the heck is it? Why does it change space-time and light?
One program I supported a few years ago:
NASA - Gravity Probe B: The Relativity Mission