The observable universe is about 93 billion light‑years wide.
Fact #1819
More Space Facts
The light you see from some stars today began traveling before humans existed.
Fact #1966 · Space
The Moon is slowly moving away from Earth.
Fact #1691 · Space
The Earth's gravity keeps the atmosphere in place.
Fact #204 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1850 · Space
The Sun occasionally emits powerful solar flares.
Fact #1620 · Space
In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
Fact #765 · Space
The Moon's surface is covered in craters.
Fact #97 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1808 · Space
Want more facts?
We have over 11,491 facts across 15 categories.