The Moon's surface is covered with regolith, a layer of loose rock and dust.
Fact #241
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Black holes can slow time so much that seconds near them equal years far away.
Fact #1776 · Space
The Moon always shows the same face to Earth.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1856 · Space
The Earth's rotation slightly bulges at the equator.
Fact #325 · Space
Comets orbit the Sun in elongated paths.
Fact #75 · Space
Saturn's rings are made primarily of ice particles and rocky debris.
Fact #17 · Space
Some stars appear to dim irregularly for reasons that are still studied.
Fact #1599 · Space
The Earth's magnetic field shields the planet from solar wind.
Fact #119 · Space
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