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
All motion is relative. Imagine your standing still on a long treadmill. That treadmill is on a train. That train is on a planet rotating around a star AND spinning on its access. That entire solar system is spinning around the centre of the galaxy. That galaxy is rotating around a much larger galaxy.
Are you really standing still on the long treadmill?
Relative to the part of the conveyor your standing on, yes. Relative to the rest of the treadmill, train, planet, star and Galaxy, no.
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