We say that the universe is expanding at an accelerating rate. I understand why we say that. But is there any specific reason we think that space is the thing that's expanding INSTEAD of just everything the universe shrinking? Or are they just the same idea with a different frame of reference?
YAZF t1_j6u803b wrote
Reply to Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator
We say that the universe is expanding at an accelerating rate. I understand why we say that. But is there any specific reason we think that space is the thing that's expanding INSTEAD of just everything the universe shrinking? Or are they just the same idea with a different frame of reference?