djellison

djellison t1_jabjb0i wrote

Reply to The Case for Callisto by MoreGull

>It's got a relatively high surface gravity.

Venus, Mars, Mercury, Io, our Moon, Ganymede, Titan and Europa all have higher.

>It is outside Jupiter's massive radiation belt

As are Venus, Mars, Mercury, our Moon

>There is water ice easily available on the surface

As there is at Mars and some would argue on certain parts of the Moon

>Close proximity to the asteroid belt

So is Mars.

>and the trojan asteroids around Jupiter,

They're actually a long way from Jupiter.

>The Jovian moon Callisto is the best body in the solar system to consider for future human colonization.

For what purpose?

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djellison t1_j98mkgm wrote

Reply to comment by Monoken3 in This image of Mars shows the north polar ice cap, the border between highlands and lowlands, former river valleys, plains covered by dark sands and the large Hellas Planitia impact basin in the south. Credit: ESA/DLR/FU Berlin by MistWeaver80

Many have advocated for that via a variety of different means.....and it's simply not enough

https://lasp.colorado.edu/home/maven/files/2018/08/Inventory-of-CO2-available-for-terraforming-Mars.pdf

There is not enough CO2 left on Mars in any known, readily accessible reservoir, if mobilized and emplaced into the atmosphere, to produce any significant increase in temperature or pressure. Even if enough CO2 were to be available, it would not be feasible to mobilize it; doing so would require processing a major fraction of the surface (analogous to regional- or planet-scale strip mining) to release it into the atmosphere, which is beyond present-day technology. Terraforming Mars is therefore not possible in the foreseeable future by utilizing CO2 resources available on the planet.

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djellison t1_j98mah6 wrote

Reply to comment by Adialaktos in This image of Mars shows the north polar ice cap, the border between highlands and lowlands, former river valleys, plains covered by dark sands and the large Hellas Planitia impact basin in the south. Credit: ESA/DLR/FU Berlin by MistWeaver80

A spacecraft was sent up there - https://www.nasa.gov/mission_pages/phoenix/main/index.html - and was able to establish ground truth for the existence of sub surface ice.

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