Cosmic Scale
Titan
Moon of Saturn · 1.4 billion km from the Sun
How big is Titan?
Titan is about 5,149 km across.
See Titan in 3D, at true scale
Titan is the only moon with a thick atmosphere, and the only world besides Earth with liquid on its surface — though its rivers, lakes and rain are methane and ethane, not water. Under a golden haze it has dunes, shorelines and weather.
At a glance
| Diameter | 5,149 km |
|---|---|
| Mass | 1.35 × 10²³ kg |
| Diameter compared with Earth | 0.404 × Earth |
| Orbits | Saturn, every 16 days |
| Air pressure | 1.5× Earth's at sea level |
| Surface | −179 °C |
| Landing | Huygens probe, 2005 |
Good to know
- Kraken Mare, its largest sea, is bigger than the Caspian Sea and at least 300 m deep.
- The air is 95% nitrogen, like Earth's, but so cold that methane plays the role water does here.
- NASA's Dragonfly, a nuclear-powered rotorcraft, is due to launch in 2028 and fly from site to site.