Space itself is expanding everywhere at once.
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The Sun occasionally emits powerful solar flares.
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The Milky Way is on a slow collision course with Andromeda.
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Neutron stars can collide and produce heavy elements.
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The observable universe is about 93 billion light‑years wide.
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The Mars Pathfinder mission tested new landing techniques.
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Cosmic microwave background radiation is evidence of the early universe.
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