कुछ तारों की गति बाधित आकाशगंगाओं में काले पदार्थ के आकार का संकेत देती हैं: The trillions of galaxies in our Universe have different shapes and sizes, which are determined by the motion of their stars. Our own galaxy, the Milky Way, is a disk galaxy made up of stars moving in circular orbits around the center in a flattened disk, with a dense collection of the stars at the
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