Light from the edge of the observable universe has been traveling toward us since shortly after the Big Bang.
Fact #6552
👍 0 · 👎 0
More Space Facts
The observable universe spans billions of light-years.
Fact #1611 · Space
The Earth's gravity keeps the Moon in orbit.
Fact #283 · Space
Neptune appears blue because of methane in its atmosphere.
Fact #167 · Space
Venus is sometimes called Earth's sister planet.
Fact #309 · Space
The Bell Labs experiment led to the discovery of the cosmic microwave background.
Fact #1021 · Space
A day on Venus is longer than its year.
Fact #1684 · Space
Some pulsars emit beams of radiation like cosmic lighthouses.
Fact #1610 · Space
Black holes form from collapsed massive stars.
Fact #205 · Space
Want more facts?
We have over 11,491 facts across 15 categories.