Callisto, Jupiter’s Most Captivating Moon

Published March 25, 2013
Updated September 1, 2017
Published March 25, 2013
Updated September 1, 2017

Callisto Jupiter Moon

Discovered in 1610 by Galileo, Jupiter’s massive moon has been known to humanity longer than the United States, and it is precisely there where the US has set its sights on the future. In 2003, NASA conducted a conceptual study called Human Outer Planets Exploration (HOPE) to explore the possibility of Callisto essentially being a galactic gas station for further exploration of the solar system. It’s not too far away, either: that same year, NASA stated that an attempt for a manned mission to Callisto may be possible in the 2040s.

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