Dark energy is thought to drive the accelerating expansion of the universe.
Fact #1595
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Mercury has no substantial atmosphere to trap heat.
Fact #249 · Space
Some pulsars emit beams of radiation like cosmic lighthouses.
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There are black holes at galaxy centers.
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Saturn has dozens of known moons.
Fact #156 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1751 · Space
The Earth's rotation is gradually slowing over time.
Fact #105 · Space
The surface of Venus is hidden beneath thick clouds.
Fact #1628 · Space
Black holes can slow time so much that seconds near them equal years far away.
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