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    Europa. It's covered in ice and is one of the smoothest objects in the Solar System. The small number of craters shows that the surface is young, possibly only a 100 million years old. (That's young geologically.) In this picture you can see that there are also cracks and streaks. The cracking is caused by tidal heating, but we don't know exactly what the staining is. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...

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    9 comments

    • Kaitlin Power

      Another Jovian moon, Europa. Europa's surface is made of water ice, and is one of the smoothest in the solar system. The smallest of the Galilean moons, it is believed to have liquid water beneath the ice. The Galileo mission provided most of the information we have of Europa; the next mission will be the European Space Agency's Jupiter Icy Moon Explorer (JUICE), due to launch in 2022.

    • Shawn Kirkpatrick

      Europa's trailing hemisphere in approximate natural color. The prominent crater in the lower right is Pwyll and the darker regions are areas where Europa's primarily water ice surface has a higher mineral content. Imaged on 7 September 1996 by Galileo spacecraft.

    • Melissa Lee Miguel

      Europa is the sixth-closest moon of the planet Jupiter, and the smallest of its four Galilean satellites, but still the sixth-largest moon in the Solar System

    • Jason Lewis

      Jupiter's moon Europa, imaged from the Galileo spacecraft. Europa's surface is largely water-ice, fueling speculation that a possible liquid water ocean may exist beneath at least some of the surface.

    • Vicki Reardon

      Europa: Europa, is the sixth-closest moon of the planet Jupiter, and the smallest of its four Galilean satellites, but still the sixth-largest moon in the Solar System. Wikipedia Distance to Earth: 628,300,000 km Gravity: 1.315 m/s² Orbital period: 85 hours Discovered: January 8, 1610 Orbits: Jupiter Discoverers: Simon Marius, Galileo Galilei

    • Paolo Licini

      NASA hopes to launch a mission to Jupiter's moon Europa, the solar system's most likely heavenly body to hold alien life, by 2025. Read more: http://www.digitaljournal.com/science/we-may-go-to-jupiter-by-2025/article/374534#ixzz2v6e7hBFL

    • megan kelley

      Jupiter's moon Europa is one of the most interesting moons in the solar system because it may support life underneath its scarred, icy surface.

    • Jonathan W

      Europa - moon of Jupiter - Europa's trailing hemisphere in approximate natural color. The prominent crater in the lower right is Pwyll and the darker regions are areas where Europa's primarily water ice surface has a higher mineral content. Imaged on 7 September 1996 by Galileo spacecraft. Europa Listeni/jʊˈroʊpə/(Jupiter II), is the sixth-closest moon of the planet Jupiter, and the smallest of its four Galilean satellites, but still the sixth-largest moon in the Solar System. Europa was discovered in 1610 by Galileo Galilei.

    • StayInspired

      Jupiter’s moon, Europa.

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