The Big Crunch, Big Rip, and Heat Death are competing theories for the ultimate fate of the universe.
Fact #6580
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Mercury has no substantial atmosphere to trap heat.
Fact #249 · Space
The observable universe spans billions of light-years.
Fact #1611 · Space
There are black holes at galaxy centers.
Fact #1714 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1856 · Space
The observable universe is about 93 billion light‑years wide.
Fact #1854 · Space
The Great Attractor is a gravitational anomaly influencing the motion of galaxies.
Fact #1596 · Space
The Earth's rotation is gradually slowing over time.
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Fast radio bursts are powerful millisecond-long radio pulses from distant galaxies.
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