Europa, the fourth-largest moon of the gas giant Jupiter, is a subject in both science fiction and scientific speculation for future human colonization. Space colonization (also called space settlement, space humanization, Space habitation, etc Mercury has been suggested as one possible target for Space colonization of the inner Solar system, along with Mars, Venus, the Moon The colonization of Venus has been a subject of much speculation and many works of science fiction since before the dawn of Spaceflight, and is still much discussed The colonization of the Moon is the proposed establishment of permanent human communities on the Moon. Lagrange Point Colonization is the colonization of the five equilibrium points in the orbit of a planet or moon its primary called Lagrange points The most obvious points for Mars is the focus of much speculation and serious study about possible human colonization which might be possible Ceres has been proposed as one possible target for human colonization in the inner Solar system. The Asteroids or more properly the Minor planets, have long been suggested as possible sites for human colonization Some of the moons of the outer planets of the Solar system are large enough to be suitable places for colonization The colonization of Jupiter refers to having a permanent human presence on Jupiter NASA performed a study called HOPE (Revolutionary Concepts for H uman O uter P lanet E xploration regarding the future exploration of Some of the moons of the outer planets of the Solar system are large enough to be suitable places for colonization Saturn’s orange moon Titan is one of several candidates for a possible future colonization of the outer planets in the solar system Advantages of Pluto Based on current theory Pluto is a potential dwarf planet to colonize because its surface is similar to the rock of Earth and Freeman Dyson has proposed that Trans-Neptunian Objects, rather than Planets are the major potential habitat of life in space TemplateInfobox Planet.--> Europa (jʊˈroʊpə; or as Jupiter has 62 confirmed moons, giving it the largest retinue of moons with "reasonably secure" orbits of any planet in the Solar System A gas giant (sometimes also known as a Jovian planet after the planet Jupiter, or giant planet) is a large Planet that is not primarily Space colonization (also called space settlement, space humanization, Space habitation, etc Europa's geophysical features, including a possible subglacial water ocean, make it a strong possibility that human life could be sustained on or beneath the surface. Water is a common Chemical substance that is essential for the survival of all known forms of Life.
The Artemis Project designed a plan to colonize Europa in 1997. The Artemis Project was a private venture to establish a permanent self-supporting base on the Moon by 2002 Year 1997 ( MCMXCVII) was a Common year starting on Wednesday (link will display full 1997 Gregorian calendar  According to the plan, scientists are to inhabit igloos and drill down into the Europan ice crust, exploring the subsurface ocean believed to exist underneath. An igloo ( Inuit language: iglu, Inuktitut syllabics: ᐃᒡᓗ "house" plural iglooit or igluit, but in English The plan also discusses use of artificial air pockets for human inhabitation. An updraft or downdraft ( air pocket) is the vertical movement of Air as a Weather related phenomenon According to the plan, a possible Europan surface base would make use of inflatable structures. Exploration of Europa and its subglacial ocean would be carried out with specialized submarines. 
There are numerous difficulties related to the colonization of Europa; one significant problem is a high level of radiation from Jupiter's radiation belt, which is approximately 10 times as strong as Earth's Van Allen radiation belts. The Van Allen radiation belt is a Torus of energetic Charged particles ( plasma) around Earth, held in place by Earth's Magnetic A human being would not survive at or near the surface of Europa for long without significant radiation shielding. Another problem is that the surface temperature of Europa normally rests at minus 170 degrees Celsius (103 kelvins). The Celsius Temperature scale was previously known as the centigrade scale. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic Colonists on Europa would have to descend to and ascend from the surface relatively quickly (though not while Europa is passing through Jupiter's magnetotail), and stay in habitats buried under the surface while there.
It is also speculated that alien organisms may exist on Europa, possibly in an aquatic form in the subglacial ocean. Extraterrestrial life is Life originating outside of the Earth.  If this is so, human colonists could well come into conflict with them - if there is an intelligent species living on Europa, though this is thought to be extremely unlikely, they may react unfavorably to human interference, and even if they are unintelligent, they may still be dangerous, e. g. if they are harmful microbes. A microorganism (also spelled micro organism or micro-organism and also called a microbe) is an Organism that is Microscopic (usually Even if life on Europa is found to be benign, human colonization raises ethical questions of ecocide and first contact procedure. The neologism Ecocide can be used to refer to any large-scale destruction of the environment. First contact is a common science-fictional theme about the first meeting between Humans and aliens or more broadly of any sentient There is also the possibility that Human exploration and habitation could cause accidental contamination of any alien habitat on Europa.