Neptune is known for its deep blue color.
Fact #94
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The Moon has no liquid water on its surface today.
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A day on Mars is slightly longer than a day on Earth.
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Venus has the longest day of any planet in the solar system.
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The observable universe is about 93 billion light‑years wide.
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The coldest place in the universe is man-made.
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Time moves slower in stronger gravitational fields.
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Time moves slower in stronger gravitational fields.
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The light you see from some stars today began traveling before humans existed.
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