Moons · Moon of Saturn

Rhea

527,108 km from Saturn · Light crosses it in 0.0051 seconds

Across

1,528 km

Vs Earth

12% of Earth

Mass

0.04% of Earth

Open Rhea in Cosmic Scale

About

Rhea is Saturn's second-largest moon, a heavily cratered ball of ice with a little rock. It is cold, old and quiet, its surface little changed for billions of years.

Saturn's second-largest moon, a battered ball of ice and rock.

At a glance

Size	1,527 km
Orbits	Saturn, every 4.5 days
Discovered	1672, Giovanni Cassini
Visited	Cassini, 2004–2017

Did you know

1. Cassini found a thin atmosphere of oxygen and carbon dioxide around it.
2. It may once have had a faint ring, but later searches did not confirm it.
3. It is the ninth-largest moon in the Solar System.

Real photo

• Rhea fully lit, from Cassini — NASA/JPL/Space Science Institute · source