The Milky Way is just one of billions of galaxies in the universe.
Fact #78
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Black holes can merge and release enormous energy.
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The Moon has no liquid water on its surface today.
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The observable universe is about 93 billion light‑years wide.
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Dark energy is thought to drive the accelerating expansion of the universe.
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Saturn's rings are made primarily of ice particles and rocky debris.
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The Earth's orbit around the Sun is slightly elliptical.
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The Oort Cloud is a theoretical shell of icy objects surrounding the solar system.
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Venus has a thick atmosphere that traps heat.
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