Mars has two tiny moons — Phobos and Deimos — so small that gravity on Phobos is 1/1000th of Earth's.
Fact #7539
👍 0 · 👎 0
More Space Facts
A teaspoon of neutron star material would weigh billions of tons.
Fact #1679 · Space
The U.S. government ran Project Stargate to study alleged psychic phenomena.
Fact #1065 · Space
Rogue planets drift through space without orbiting a star.
Fact #1609 · Space
The Kepler mission searched for Earth-like exoplanets.
Fact #1025 · Space
Black holes can slow time so much that seconds near them equal years far away.
Fact #1940 · Space
Some birds migrate using landmarks and stars.
Fact #477 · Space
The Hubble Space Telescope revolutionized deep-space imaging.
Fact #1029 · Space
Project Mercury was the first U.S. human spaceflight program.
Fact #1074 · Space
Want more facts?
We have over 11,491 facts across 16 categories.