Eli5 How do we know that gravity and acceleration is two different thing?

Question

How do we know that gravity is not an accelerated expanding of space?

It seems to do almost same thing to interacting objects.

“it’s complicated” comment is not welcome.

In: 0

Answer 1

First off, what the sam hill is “an accelerated expanding of space”?

Second, space doesn’t move with gravity. Gravity distorts space but we can see relativistic effects due to speed regardless of gravitational effects.