Neutron stars are so dense that a teaspoon of their material would weigh about a billion tons.

A rhinoceros has thick skin but can still get sunburned.

Fact #1265 · Space

Gravitational waves were detected a century after Einstein predicted them.

Fact #1607 · Space

Neutron stars are among the densest objects in the universe.

Fact #47 · Space

Jupiter is the largest planet in the solar system.

Fact #44 · Space

There are more trees than stars in our galaxy.

Fact #1703 · Space

The U.S. government ran Project Stargate to study alleged psychic phenomena.

Fact #1065 · Space

Light from distant galaxies shows us the past.

Fact #1682 · Space

Cosmic microwave background radiation is evidence of the early universe.

Fact #1608 · Space