Fast Facts: Jupiter's moon, Europa

Fast Facts: Jupiter's moon, Europa
Age 4.5 billion years, about the same age as Jupiter
Location Solar system, in orbit around Jupiter
Avg. distance from Jupiter 670,900 km (417,000 mi)
Diameter 3,100 km (1,900 mi)
Mass 4.80 x 1022 kg
Orbital period around Jupiter 3.55 days. The same side of Europa always faces Jupiter. It takes the same amount of time to make one revolution on its axis as it does to complete an orbit around Jupiter.
Distinguishing features Europa, a Galilean moon, is just slightly smaller than Earth's Moon. The ice-covered moon has one of the smoothest surfaces in the solar system, marked by cracks and streaks, with few craters. Scientists believe there is a salt-water ocean beneath the surface.
Europa
Jupiter's moon, Europa

Fast Facts: Jupiter's moon, Europa