The Sun makes up 99.8% of solar mass.
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The largest volcano is on Mars.
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The observable universe is about 93 billion light‑years wide.
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The Earth's magnetic north pole moves over time.
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Space is completely silent.
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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 observable universe spans billions of light-years.
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Some stars appear to dim irregularly for reasons that are still studied.
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