The Juno spacecraft orbits Jupiter's poles — no spacecraft had previously done this.
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Black holes can merge and release enormous energy.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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The Earth's atmosphere gradually thins into outer space.
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The Moon slowly moves away from Earth by a few centimeters each year.
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The Moon's surface temperature varies dramatically.
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A day on Venus is longer than its year.
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Saturn has dozens of known moons.
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The light you see from some stars today began traveling before humans existed.
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