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    Picture of the Day: Galileo's Europa

    Astronomy Picture of the Day
    NASA Release | 30 November 2019


    Galileo's Europa Remastered
    Image Credit: NASA, JPL-Caltech, SETI Institute, Cynthia Phillips, Marty Valenti
    Looping through the Jovian system in the late 1990s, the Galileo spacecraft recorded stunning views of Europa and uncovered evidence that the moon's icy surface likely hides a deep, global ocean. Galileo's Europa image data has been remastered here, using improved new calibrations to produce a color image approximating what the human eye might see. Europa's long curving fractures hint at the subsurface liquid water. The tidal flexing the large moon experiences in its elliptical orbit around Jupiter supplies the energy to keep the ocean liquid. But more tantalizing is the possibility that even in the absence of sunlight that process could also supply the energy to support life, making Europa one of the best places to look for life beyond Earth. What kind of life could thrive in a deep, dark, subsurface ocean? Consider planet Earth's own extreme shrimp.
    __________________________________

    Although the description doesn't mention it, Europa is one of Jupiter's 79 moons. It is subcategorized as one of Jupiter's four Galilean moons. These moons were discovered by Galileo Galilei and were named in his honor. Europa is slightly smaller than our Moon. - ilan
    Last edited by ilan; 11-30-2019 at 05:50 PM.
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