Titan

The other Earth

Vital statistics

• Mean radius: 2,575 kilometres
• Mass: 1.34 × 10²³ kilograms
• Surface gravity: 1.35 metres per second squared
• Sidereal rotation: 16 days
• Orbital period: 16 days
• Mean temperature: -179 °C
• Axial tilt: 0.3 degrees

Field notes

• Titan is the only moon with a thick atmosphere — and the only world besides Earth with rain, rivers, lakes and seas on its surface.
• Its weather runs on methane instead of water: at −179 °C, natural gas falls as rain and pools into seas larger than the Great Lakes.
• The air is so thick and the gravity so low that with wings strapped to your arms, you could fly under your own muscle power.
• NASA's Dragonfly helicopter launches this decade to island-hop across Titan's dunes.

Data: NASA Planetary Fact Sheets. Explore the full interactive 3D map at the home page — every orbit is computed from real Keplerian elements.