Rogue black holes wander through galaxies at millions of miles per hour after being ejected from their original positions.
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Saturn has dozens of known moons.
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The Wow! signal was a strong radio signal detected in 1977 that has never been fully explained.
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Comets orbit the Sun in elongated paths.
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The Earth's magnetic field shields the planet from solar wind.
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Some galaxies contain supermassive black holes millions of times the Sun’s mass.
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The Moon has no liquid water on its surface today.
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The light you see from some stars today began traveling before humans existed.
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