There may be a diamond planet — 55 Cancri e is thought to be largely composed of carbon in diamond form.
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The Earth's axis is tilted about 23.5 degrees.
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The Moon was likely formed after a massive collision with early Earth.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Moon's gravity influences ocean tides.
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The light you see from some stars today began traveling before humans existed.
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Neptune is known for its deep blue color.
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Some galaxies are trillions of miles wide.
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