can an object be stationary in space, I mean absolutely stationary?

Question

I know an object can be stationary relative to another, but is there anything absolutely stationary in the universe? Or is space itself expanding and thus nothing is stationary?

In: Physics

Answer 1

There might be. But we haven’t found it yet. One of the properties of Space-time is that everything is always in motion. Mass is always falling into a larger gravity well. Even Space-time itself seems to be moving (expansion).