Some planets rain diamonds under certain conditions.
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Venus has the longest day of any planet in the solar system.
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The Moon has no atmosphere like Earth's.
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There are rogue planets drifting through space with no star at all.
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The Vostok 1 mission marked the first human spaceflight.
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The observable universe is about 93 billion light‑years wide.
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The Moon's gravity influences ocean tides.
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Some exoplanets orbit two stars at once.
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The Sun accounts for more than 99% of the mass of our solar system.
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