For hundreds and hundreds of years "scientists" have stated that the earth (and thus the solar system) is near or at the center of the galaxy. (For instance, only about 90 years ago there was a huge debate between 2 scientists Shapley and Curtis. The first said that there was only one galaxy in the entire universe with our solar system far off to one side, The latter claimed that the solar system was at the center our galaxy but that there are many galaxies in the universe. We now understand that our solar system is located "about 26,000 light-years from the center of the Milky Way Galaxy, which is about 80,000 to 120,000 light-years across (and less than 7,000 light-years thick). We are located on on one of its spiral arms, out towards the edge. It takes the sun (and our solar system) roughly 200-250 million years to orbit once around the Milky Way. In this orbit, we (and the rest of the Solar System) are traveling at a velocity of about 155 miles/sec (250 km/sec). The arms of the Milky Way are named for the constellations that are seen in those directions. The major arms of the Milky Way galaxy are the Perseus Arm, Sagittarius Arm, Centaurus Arm, and Cygnus Arm; our Solar System is in a minor arm called the Orion Spur."