The universe is estimated to be about 13.8 billion years old.
Fact #1623
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Some stars explode when they die.
Fact #1717 · Space
The Earth orbits the Sun at about 30 kilometers per second.
Fact #137 · Space
The Milky Way is estimated to contain hundreds of billions of stars.
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Mercury has no substantial atmosphere to trap heat.
Fact #249 · Space
The Moon's surface is covered with regolith, a layer of loose rock and dust.
Fact #241 · Space
Interstellar objects have passed through our solar system.
Fact #1604 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1808 · Space
Asteroids vary widely in size and composition.
Fact #1631 · Space
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