TODAY WE WIL LEARN ABOUT SOLAR SYSTEMOur sun is one of at least 100 billion stars in the Milky Way, a spiral galaxy about 100,000 light years across. The stars are arranged in a pinwheel pattern with four major arms, and we live about two-thirds of the way up one of them. Many if not most of the stars host their own families of planets. More than a thousand of these extrasolar (or exoplanets) have been discovered and thousands more are awaiting confirmation.
All of the stars in the Milky Way orbit a supermassive black hole at the galaxy's center, which is estimated to be some 4 million times as massive as our sun. Fortunately, it is a safe distance of around 28,000 light years away Earth. The Milky Way zips alonga galactic orbit at an average speed of about 514,000 miles per hour (828,000 km/hr). It takes about 230 million years for our solar system to make one revolution around the galactic center.

Actually there a lot of thing that we donno about spaces, spaces is the biggest area and there a lot of lot galaxy. If you guys see the picture, there are light spots and in each spot there have its own planets. dont you thing its amazing.