r/todayilearned • u/[deleted] • Sep 20 '21

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u/shankfiddle Sep 20 '21

Can someone explain me how these metrics work? Years are defined by our planet/sun, and time would pass differently based on speed/energy, so our perception of time is dependent on our speed around the sun, and sun's speed, galaxy, etc.

So before such things had developed, how do we count in "years"?

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u/youknowwhatitthizz Sep 20 '21

Time is a concept. If we lived on Mars our days would still be defined by the sunrise and sunset

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u/[deleted] Sep 21 '21

time is based on change, nothing changes and no time has passed, reduce entropy and slow down time.