8 months ago
Last edited at 8:38AM on 7/18/2013
Yes, all stars (solar systems) in the galaxy revolve around the Milky Way's supermassive black hole. The speed at which they revolve is different, depending on the star's distance from the black hole. Our Sun completes one revolution every 250 million years, at a speed of around 500,000 mph. Stars closer to the black hole have been observed at revolving with speeds near 11 million mph.