Spaze

Moon of Mars

Phobos

A lumpy 27 km moon that circles Mars three times a day and is slowly spiralling inward.

Drive there in 3D Can we live on Phobos? Ask Elon
Size
27 × 22 × 18 km
Orbit
7 h 39 min
Above Mars
6,000 km
Fate
Breaks up in ~40 Myr

Can we live on Phobos?

Air: none to speak of. You’d live in sealed, pressurised habitats.

Gravity: 0.00 g. Someone who weighs 70 kg on Earth would weigh 0 kg there.

Ground: Carbon-rich rock and dust, grooved by tides.

Atmosphere

Measured by Mars Express, MRO

Nearby in the guide