Eli5 if the universe is expanding, then why isn’t the earth, and everything in it (us) getting measurably bigger too?
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Imagine you are standing in one spot wearing roller skates. On your left is a 250 lb NFL lineman. On your right is a 50 lb child. They each begin pulling on you in opposite directions. Which way will you go?
The universal expansion is like the 50 lb child, gravity is like the 250 lb lineman. At distances smaller than galactic clusters, gravity wins.
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