Does the sun move at all?
Asked by: Booger


Relative to what?
Motion of any object is only valid when compared to something else.

The Sun orbits the center of the Milky Way Galaxy at about 225 Km/sec, and our Galaxy itself has a motion in its Local Group of galaxies of about 100 Km/sec. Our Local Group, in turn, has a speed of about 220 Km/sec relative to the Super Cluster it resides in, and there are further layers of motion beyond that.

Milky Way
The Milky Way - Our Galaxy

Perhaps the best measure of the Sun's overall 'motion' is based on the observed Doppler Shift of the Cosmic Background Radiation (COBE). That measure indicates a motion of about 390 Km/sec for our Sun vs. the Universe as a whole.
Answered by: Paul Walorski, B.A., Part-time Physics Instructor

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