Why does the sun rotate and all other planets in the universe do they rotate?
The sun does rotate on its axis– once every 25 days at the equator– http://www.windows.ucar.edu/tour/link=/s… All of the planets in the solar system rotate– we can see this in our telescopes and with our space probes. Mercury is a little weird however– http://cseligman.com/text/planets/mercur… Planets circling around other stars cannot be seen to rotate– just too far away. However I would suspect that planet rotation is a universal constant throughout the universe.
