The Earth orbits just one of the 200-400 billion stars that make up the Milky Way. This star, the Sun, orbits at a distance of about 27000 light years from the Galactic Centre, travelling at 220 km/s (one mile every seven thousandths of a second). The Milky Way is about 100000 light years across, but only about … Continue reading The Milky Way is shaped like a CD