🌙 Moon
Deimos
The smaller and farther of Mars’s two moons.
- Size
- 12 km across, 0% as wide as Earth
- Goes round Mars
- every 30.3 hours
- Discovered
- 1877, by Asaph Hall
Did you know?
- From the surface of Mars it would look like a bright star rather than a disc.
- Its name means “dread”, and Phobos means “fear”.
Compare Deimos with EarthSide by side, to scale, in the app
More NASA photos of DeimosStraight from NASA’s image library, in the app
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All of solar system
Mercury
The smallest planet, and the closest to the Sun.
Venus
The hottest planet, hidden under thick clouds.
Earth
Our home, the only world known to have life.
Mars
The red planet, with the tallest volcano in the solar system.
Jupiter
The biggest planet, with a storm larger than Earth.
Saturn
The ringed giant, light enough to float in water.