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New Views of Ganymede and Europa From Earth’s Most Powerful Telescope
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All of Jupiter's Large Moons Have Auroras
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I've commented before that Callisto is the safest of the Jovian Moons for a potential base/colony, due to the least radiation from the Jupiter version of the van Allen analog radiation belts surrounding the planet. Isn't there a Callisto thread?
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I've commented before that Callisto is the safest of the Jovian Moons for a potential base/colony, due to the least radiation from the Jupiter version of the van Allen analog radiation belts surrounding the planet. Isn't there a Callisto thread?
Another problem hindering any manned visits to Ganymede is the sheer mass of Jupiter, at 318 times that of Earth. Escape velocity is an impressive 59.5km/s. Ganymede orbits Jupiter at a distance 2.5x the Earth-Moon distance. Safe landing on the surface of Ganymede means entering a very deep gravity well, with an associated high velocity change. Any manned visits to the Jovians will be expensive for this reason alone, before accounting for the need for radiation shielding. Callisto is further out and cheaper to reach. I think the heavy delta-V needed to access the Jovian moons will limit options for colonisation for a long time to come.
"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."
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Composition and thermal properties of Ganymede's surface from JWST/NIRSpec and MIRI observations
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