what's the diameter of the milky way
Milky Way The Milky Way is a barred spiral galaxy with a diameter between 100,000[30] and 180,000 light-years.[31] The Milky Way is estimated to contain 100–400 billion stars.[32][33] There are probably at least 100 billion planets in the Milky Way.[34][35] The Solar System is located within the disk, about 26,000 light-years from the Galactic Center, on the inner edge of one of the spiral-shaped concentrations of gas and dust called the Orion Arm. The stars in the inner ≈10,000 light-years form a bulge and one or more bars that radiate from the bulge. The very center is marked by an intense radio source, named Sagittarius A*, which is likely to be a supermassive black hole.