There are at least two trillion galaxies in the observable universe.
Fact #3871
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Saturn could float in water because its density is low.
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The Milky Way is just one of billions of galaxies in the universe.
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The telescope expanded understanding of the universe.
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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 light you see from some stars today began traveling before humans existed.
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The Moon's surface temperature varies dramatically.
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Neptune has some of the fastest winds in the solar system.
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The Sun makes up 99.8% of solar mass.
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