The Most Extraordinary Facts About Our Galaxy

The Milky Way, our home galaxy, is a barred spiral galaxy with a diameter of about 100,000 light-years and contains an estimated 100-400 billion stars. It is the second largest galaxy in the Local Group, after the Andromeda Galaxy. The Milky Way has four major spiral arms, which are home to most of the galaxy's young stars and gas. Other notable features of the Milky Way include the central supermassive black hole, Sagittarius A*, and a prominent galactic bulge. The galaxy is thought to be about 13.6 billion years old, and its mass is estimated to be about 1 trillion times the mass of the Sun.

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