Where is the sun located in our galaxy?
http://en.wikipedia.org/wiki/Sun says: The Sun orbits the center of the Milky Way galaxy at a distance of approximately 26,000 light-years from the galactic center, completing one revolution in about 225–250 million years. Its approximate orbital speed is 220 kilometers per second, plus or minus 20 km/s. This is equivalent to about one light-year every 1,400 years, and about one AU every 8 days. These measurements of galactic distance and speed are as accurate as we can get given our current knowledge, but will change as we learn more. Context: Since the Milky Way has radius of 50,000 ly, the Sun is roughly at the middle of the radius.
Galaxy Song Just remember that you’re standing on a planet that’s evolving And revolving at nine hundred miles an hour, That’s orbiting at nineteen miles a second, so it’s reckoned, A sun that is the source of all our power. The sun and you and me and all the stars that we can see Are moving at a million miles a day In an outer spiral arm, at forty thousand miles an hour, Of the galaxy we call the ‘Milky Way’. Our galaxy itself contains a hundred billion stars. It’s a hundred thousand light years side to side. It bulges in the middle, sixteen thousand light years thick, But out by us, it’s just three thousand light years wide. We’re thirty thousand light years from galactic central point. We go ’round every two hundred million years, And our galaxy is only one of millions of billions In this amazing and expanding universe. The universe itself keeps on expanding and expanding In all of the directions it can whizz As fast as it can go, at the speed of light, you know, Twelve million mile
