Milky Way is our galaxy from "summary" of Space Encyclopedia by David A. Aguilar,Christine Pulliam,Patricia Daniels
The Milky Way is a vast, swirling collection of billions of stars, planets, gas, and dust that stretches across the night sky like a shimmering river of light. Our solar system, with its eight planets (including Earth), orbits within the Milky Way, about two-thirds of the way out from the center of the galaxy. The Milky Way is so massive that its gravitational pull keeps all of its member stars and planets in orbit around its center. At the heart of the galaxy lies a supermassive black hole that is millions of times more massive than our sun. This black hole exerts a powerful gravitational force that shapes the movement of stars and other objects within the galaxy. The Milky Way is just one of billions of galaxies in the universe, each containing their own unique collect...
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