The Hubble Space Telescope has made over 1.5 million observations since its launch in 1990.
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The observable universe is about 93 billion light‑years wide.
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The Sun will eventually expand into a red giant.
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The Milky Way galaxy contains billions of stars.
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The Milky Way and Andromeda galaxies are on a slow collision course.
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The universe is expanding faster.
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The center of the Milky Way contains a supermassive black hole.
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The Moon has no breathable atmosphere.
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The Earth's rotation causes day and night cycles.
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