How cold is it on Ganymede, Jupiters moon?
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ANSWERS: 2
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Approx 109 K (−172°C) Very cold :-)
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...daytime temperatures ranging across the surface from 90 to 160 Kelvin (or -297 to -171 degrees Fahrenheit). Jupiter and its moons receive less than 1/30th the amount of sunlight that the Earth does, and Ganymede has essentially no atmosphere to trap heat. Ganymede's day is just over 7 Earth days long, the same time it takes to orbit Jupiter once. Temperature: http://www.solarviews.com/cap/jup/gantemp.htm
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