Submitted by Sabre-Tooth-Monkey t3_zyesvt in askscience
Aseyhe t1_j2859vs wrote
Reply to comment by klausesbois in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey
The CMB rest frame is the frame in which we calculate the age of the universe, so it's definitely an interesting idea to think about how our elapsed time might differ. However, for 370 km/s motion, the effect of relativistic time dilation is about one part in a million, and the gravitational time dilation (due to the Milky Way's gravitational potential) is of similar order.
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