The solar system contains about 400 billion stars

Why is it called the Milky Way Galaxy?The Milky Way Galaxy takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen f. . How big is the Milky Way Galaxy?The first reliable measurement of the size of the Milky Way Galaxy was made in 1917 by American astronomer Harlow Shapley. Assuming that the globul. . Is Earth in the centre of the Milky Way Galaxy?The solar system is about 30,000 light-years from the centre of the Milky Way Galaxy. The Galaxy itself is thought to be about 100,000 light-years. [pdf]
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