The Wow! signal was a strong radio signal detected in 1977 that has never been fully explained.
Fact #1593
More Space Facts
Neutron stars are among the densest objects in the universe.
Fact #47 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1902 · Space
Black holes have gravitational pulls so strong that not even light can escape.
Fact #66 · Space
The Earth orbits the Sun at about 30 kilometers per second.
Fact #137 · Space
The event horizon marks the boundary around a black hole.
Fact #1616 · Space
The Earth's rotation is gradually slowing over time.
Fact #105 · Space
The Milky Way contains regions of active star formation.
Fact #219 · Space
The Earth's orbit determines the length of the year.
Fact #318 · Space
Want more facts?
We have over 11,491 facts across 15 categories.