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RE: See the First Images NASA’s Juno Took As It Sailed by Ganymede
The difference between our moon and Ganymede is not much noticeable, from the image it is noted that it does not have an atmosphere but it can have a gravitational field that allows an astronaut to explore it in some future, it was even talked about that there could be life in Ganymede but if there is life it will be microbial.