If motion measured relative to stationary point then is it will be right to assume earth is stationary?

Motion is measured relative to a reference point. This point can be located anywhere. The reference point is not moving because movement defined in term of change in distance. The reference point is always located in the same distance (0) from itself. If the reference point is earth then earth is stationary and the entire universes is revolving around planet earth.If motion measured relative to stationary point then is it will be right to assume earth is stationary?You can certainly create a reference system assuming a fixed Earth. For observational purposes, celestial coordinates are done like that, and it would be very awkward to use any other coordinate system. However, the physics works out best using an inertial reference, that is, one in which accelerations can be explained in terms of forces acting on the bodies. Since there is no force that would cause the universe to revolve around us (revolving involves change of direction, and therefore acceleration), a geocentric reference is not used for astrophysics.If motion measured relative to stationary point then is it will be right to assume earth is stationary?no not at all. if we are looking at a star close to the galaxies black hole then we are it would be obvious that it revolves around that.



and the galaxies wouldnt appear to revolve around us.If motion measured relative to stationary point then is it will be right to assume earth is stationary?This was the approach geocentric churchmen used to argue against Copernicus' theory. It works if you just talk about Sun and the Earth since you can use either as a reference. It, however, could not explain stars' parallax motion, Venus' phase change, among many other observations. The point is that you can use whatever reference you please, it doesn't change the physics. When it gets too complicate to accommodate all observations, it is time for something else.If motion measured relative to stationary point then is it will be right to assume earth is stationary?
True. But you must understand that the universe is moving relative to earth AND VICE VERSA!



From a mathemathical standpoint, it does not matter.