The observable universe contains an estimated two trillion galaxies.
Fact #2677
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More Space Facts
The observable universe is about 93 billion light‑years wide.
Fact #1865 · Space
The Earth's rotation speed varies slightly over time.
Fact #237 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1726 · Space
Cosmic rays constantly bombard Earth from space.
Fact #1621 · Space
Cosmic microwave background radiation is evidence of the early universe.
Fact #1608 · Space
The Moon's surface temperature varies dramatically.
Fact #299 · Space
Exoplanets have been discovered in habitable zones around distant stars.
Fact #1625 · Space
Rogue planets drift through space without orbiting a star.
Fact #1609 · Space
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