Moon of Mars
Phobos
A lumpy 27 km moon that circles Mars three times a day and is slowly spiralling inward.
- 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
- None to speak of
Measured by Mars Express, MRO