The Earth's rotation causes day and night cycles.
Fact #185
More Space Facts
The observable universe spans billions of light-years.
Fact #1611 · Space
The Earth's magnetic field protects against solar radiation.
Fact #269 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1940 · Space
The Moon completes its phases in about 29.5 days.
Fact #282 · Space
The light you see from some stars today began traveling before humans existed.
Fact #1966 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1787 · Space
Comets are made of ice, dust, and rocky material.
Fact #33 · Space
The Moon slowly moves away from Earth by a few centimeters each year.
Fact #11 · Space
Want more facts?
We have over 11,491 facts across 15 categories.