Moon of Jupiter

Callisto

The most heavily cratered surface we know of. It has barely changed in four billion years.

Can we live on Callisto?

Air: only a faint trace of CO₂, O₂, far too thin to breathe. You’d live in sealed, pressurised habitats.

Gravity: 0.13 g. Someone who weighs 70 kg on Earth would weigh 9 kg there.

Ground: Dark ice and rock, cratered all over.

Measured by Galileo