The cosmic web is a vast structure of filaments of dark matter connecting galaxy clusters across the universe.
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Some galaxies contain supermassive black holes millions of times the Sun’s mass.
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The Sun will eventually expand into a red giant.
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There are rogue planets drifting through space with no star at all.
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The observable universe is about 93 billion light‑years wide.
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The Earth's atmosphere gradually thins into outer space.
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The Earth's rotation causes day and night cycles.
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The observable universe is about 93 billion light‑years wide.
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