🌙 Moon
Europa
An icy moon hiding a salty ocean underneath.
- Size
- 3,100 km across, 24% as wide as Earth
- Goes round Jupiter
- every 3.6 Earth days
- Discovered
- 1610, by Galileo
Did you know?
- Its ocean may hold twice as much water as all of Earth’s oceans.
- It is one of the best places to look for life beyond Earth.
Photographed or visited by
Galileo
Fourteen years at Jupiter, and a probe dropped into its clouds.
Compare Europa with EarthSide by side, to scale, in the app
More NASA photos of EuropaStraight from NASA’s image library, in the app
Explore more
All of solar system
Mercury
The smallest planet, and the closest to the Sun.
Venus
The hottest planet, hidden under thick clouds.
Earth
Our home, the only world known to have life.
Mars
The red planet, with the tallest volcano in the solar system.
Jupiter
The biggest planet, with a storm larger than Earth.
Saturn
The ringed giant, light enough to float in water.