Eli5 if the universe is expanding, then why isn’t the earth, and everything in it (us) getting measurably bigger too?

Question

Eli5 if the universe is expanding, then why isn’t the earth, and everything in it (us) getting measurably bigger too?

In: 4

Answer 1

For small scale objects (where “small-scale” means like planets), gravity is enough to hold matter together and keep it the same size .The expansion of space is extremely minute and weak at distances as small as planets. It’s distant outer empty space that is expanding, space that is empty on a size scale billions of times bigger than planets.