The Milky Way contains an estimated 100–400 billion stars.
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The telescope expanded understanding of the universe.
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The light you see from some stars today began traveling before humans existed.
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Quasars are extremely bright objects powered by supermassive black holes.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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Neptune is known for its deep blue color.
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Comets orbit the Sun in elongated paths.
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Solar eclipses occur when the Moon blocks the Sun from Earth's view.
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Black holes can slow time so much that seconds near them equal years far away.
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