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There are billions of galaxies in our observable universe, and each one contains billions of stars. Our Milky Way galaxy is one of those galaxies with a diameter of 100000 light years. The Milky Way galaxy has about 250 billion stars, Our sun is just one of them.
Astronomers believe our solar system formed about 4.5 billion years ago when massive interstellar clouds of gas and dust collapsed on themselves, giving rise to our Sun, which anchors our solar system. After the formation of the Sun, other planets formed and began to revolve around the Sun. Planets, dwarf planets, moons, asteroids, comets, and meteoroids revolve around it. What are the peculiarities of those planets, and what is the exact boundary of the solar system?
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