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
No, because velocity is determined based on reference frame. You might be practically still in a chair you’re sitting in, despite invisibly small movements and vibrations of molecules, etc. You’re velocity is essentially 0 m/s relative to the chair. But relative to the sun, you’re still moving around 30,000 m/s. And relative to the center of the galaxy, based on a quick google search and a quick calculation, you’re moving at about 230,000 m/s. It’s all about reference frame.
Unless you somehow get all particles in existence to be still relative to each other, there is no such thing as being absolutely stationary.
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