Answer. Credit: NASA/JPL . Under all of these circumstances, would it not be better to simply establish outposts on the surface, or perhaps within or directly underneath the ice? Even if you did form something that looked like Earth with a thin atmosphere, the surface ocean would cover the entire surface. These satellites are lost on a regular basis, and new ones are added all the time. Send your trade fleet to distant moons! In fact, with a surface exposure of about  0.01 rem a day, Callisto is well within human tolerances.Much like Europa and Ganymede, and Saturn’s moons of Enceladus, Mimas, Dione, Titan, the possible existence of a subsurface ocean on Callisto has led many scientists to speculate about the possibility of life. I am writing a sci fi Novel in which mankind has colonized the solar system and I am in need of some more information. Jupiter’s four largest moons are known as the Galilean Satellites, named after the astronomer Galileo Galilei who first spied them through his telescope in 1609. Such a shell would ensure that the process of creating of an atmosphere could be carefully controlled and none would be lost before the process was complete. This would be achieved through a great deal of heat, either through asteroid impact, thermonuclear action or orbital mirrors. Realistically, they would take up a vast amount of time, effort and resources to even get to the most basic levels of life sustaining terraforming. Building an enveloping structure big enough for an entire moon – which range from 3121.6 km to 5262.4 km in diameter – would require massive amounts of material. Download TerraGenesis today! It features colony tiles where you can build colonies and send your trade fleet. Operation Saturn, a serial of the Dan Dare comic strip series, ran during 1952-53 and was set among the moons of Jupiter. Decades would pass without us ever revisiting after those first few missions, but humanity has finally returned.The Moon is much smaller than a planet, so you'll need to manage the space for your colonies wisely. This in turn would require large shields to be built in orbit of the moons (requiring another massive investment in resources), or would dictate that all settlements built on the surfaces include heavy radiation shielding.On top of that, as the surfaces of Europa, Ganymede and Callisto (especially Callisto!) will attest, the Jovian system is frequented by space rocks. The mission is scheduled to launch in 2022 and expected to reach Ganymede a decade later. These would in turn create a greenhouse effect, warming the surface even more, and triggering a process known as radiolysis (the dissociation of molecules through exposure to nuclear radiation). Although it seems to be too thin for life as we know it to exist, the potential for some form of terraforming exists. The main problem with terraforming either of those moons is their gravity isn't large enough to keep any atmospheric gases for long after they're introduced. The low altitudes will be covered with vast oceans while the higher altitudes will be … Or you can get the all access pack. The process would begin by heating the surface in order to sublimate the ice, a process which could involve orbital mirrors to focus sunlight onto the surface, nuclear detonators, or crashing comets/meteors into the surface.Once the surface ice begins to melt, it would form dense clouds of water vapor and gaseous volatiles (such as carbon dioxide, methane and ammonia). Would it even be possible to build floating cities on such a world? Given the combination of these factors, it is considered a strong possibility that organic life also exists in this ocean, possibly in microbial or even multi-celled form, most likely in environments similar to Earth’s deep-ocean hydrothermal vents.Because of its abundant water, which comes in both liquid and solid form, Europa is a popular candidate for proponents of colonization and terraforming. Europa is a hugely powerful radiation belt from Jupiter which makes sustaining life on it very impractical. Using nuclear devices, cometary impacts, or some other means to increase the surface temperature, Europa’s surface ice could be sublimated and form a massive atmosphere of water vapor.https://youtu.be/GqTaDCt_F1YThis vapor would then undergo radiolysis due to exposure to Jupiter’s magnetic field, converting it into oxygen gas (which would stay close to the planet) and hydrogen that would escape into space. And since any mission to this region of space would need to haul back several tons of icy cargo, the wait time involved would be on the order of decades.Ergo, any vessels transporting human crews to the Jovian system would likely have to rely on cryogenics or hibernation-related technology in order to be smaller, faster and more cost-effective. One option to counter this could be building huge radiation shields, but a more likely outcome would be to create a magnetic field around the moon that would deflect the harmful radiation. In fact, most of Jupiter’s satellites are asteroids it picked up as they sailed through the system. But with zero experience of terraforming, we might consider colonizing our natural satellite first. Europa, the fourth-largest moon of Jupiter, is a subject in both science fiction and scientific speculation for future human colonization.Europa's geophysical features, including a possible subglacial water ocean, make it a possibility that human life could be sustained on or beneath the surface. Like Europa, this could be done by heating up the surface through various means, sublimating the water ice, and allowing radiolysis to convert it into oxygen. However, the ice from Europa could be extremely valuable in terraforming the outer moons of Jupiter. Colonize the clouds of Jupiter! Terraforming Jupiter and Saturn - Universe Sandbox 2. Much like some other candidates there is an abundance of water (ice) on the surface but, unlike the others, it is at a far greater distance from Jupiter. Io resides in the radiation belt, similar to Europa, so would need either shields or a magnetosphere put in place. To break it down, converting one or more of the Galileans into something habitable to humans presents many difficulties, some of which may prove to be insurmountable. The clouds of Jupiter are no longer beyond our reach. A sustainable atmosphere is the first item on the agenda. When it comes to terraforming the moons of Saturn the process is relatively similar to that of the Galilean moons of Jupiter. Even Pluto will prove to be useful to humanity. Jupiter's four largest moons – aka. This could be done through asteroid impact, which would also benefit the terraforming process by introducing extra heat. The resulting world would be an ocean planet, but with oceans that reached to depths of between 130 and 350 km.https://youtu.be/NGjK_UQbkLI. In fact, Io has the least amount of water of any known body in the Solar System, which is likely due to Jupiter being hot enough early in the evolution of the Solar System to drive volatile materials like water off its surface.Taken together, all of this adds up to Io being a total non-starter when it comes to terraforming or settlement. Terraforming; Beyond These Walls You Are Not My Master; 13.12.2009 | 14:55 . This is a perfect opportunity for the corporations to trade with the colonies, harvest resources, and build colonies of their own! Plus, in its current rotation a day lasts for 3.5 days on Earth. Combined with oxygenated water, life forms could exist at the core-mantle boundary in the form of extremophiles, much like on Europa. Explainer: What is the global Covid-19 vaccine initiative to which Singapore has pledged S$6.7m? These moons are believed to have been created by an impact with the moon Carme. Again, this would likely have to involve orbital mirrors, given Enceladus' distance from our Sun. Probably the hardest and most inhospitable candidate of Jupiter’s moons. And given that a lot of these moon’s resources could be harvested for terraforming other worlds (such as Mars and Venus), would it not make sense to terraform these worlds first and circle back to the outer Solar System later?Third, a terraformed Europa, Ganymede and Callisto would all be water worlds with extremely deep oceans. That said, the size of Ganymede just might not be large enough to have the gravitational pull to keep that atmosphere in place. Terraforming the moons in Jupiter’s orbit is a topic that has captured both scientists and writer’s imaginations alike. Because of this, Io is completely enveloped by Jupiter’s powerful magnetic field, which also the surface is exposed to significant amounts of harmful radiation. The moon’s 2:1 and 4:1 orbital resonance with Europa and Ganymede (see below) also contributes to its orbital eccentricity of 0.0041, It’s orbit is nearly circular, with a eccentricity of 0.09, and lies at an average distance of 670 900 km from Jupiter.