The Big Crunch, Big Rip, and Heat Death are competing theories for the ultimate fate of the universe.
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Black holes can merge and release enormous energy.
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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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The Moon's surface temperature varies dramatically.
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Comets can develop long tails when near the Sun.
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The telescope expanded understanding of the universe.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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The Moon's surface is covered in craters.
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The universe is estimated to be about 13.8 billion years old.
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