The Earth's gravity keeps the Moon in orbit.
Fact #283
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Neutron stars are among the densest objects in the universe.
Fact #47 · Space
Black holes can bend light through gravitational lensing.
Fact #1598 · Space
Neutron stars can spin hundreds of times per second.
Fact #1597 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1904 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1848 · Space
Cosmic microwave background radiation is evidence of the early universe.
Fact #1608 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1830 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1896 · Space
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