Nasa should focus their future solar system missions on one of Jupiter’s moons, Europa, and one of Saturn’s moons, Enceladus. The most essential thing to life is water and sunlight, all known organisms need it whether it is tiny microscopic bacteria or giant roaming creatures. Europa is one of the best candidates for a life wielding inhabitable environment. Europa was always thought to have a very large salted ocean under its frozen crust, and after a close look through the spacecraft Galileo, there were several signs of plumes emerging from the surface of Europa during its orbit around Europa. With several sightings through the close encounters the Galileo had with Europa’s surface and the Hubble Deep Field telescope, many plumes were repeatedly seen. Many of the areas were well in the inhabitable living range as Elizabeth Turtle, a research scientist said,” [the subsurface ocean] is likely the most habitable part of Europa because it is warmer and it is protected from the radiation environment by the ice shell.” Similarly to Europa, past Enceladus’s thick atmosphere, lakes, and rivers of liquid methane, there is believed to be an ocean beneath the icy surface. There have been both very old and new discoveries clouds of vapors studied through the Cassini spacecraft. The geyser-like hydrogen molecules are most likely coming from chemical reactions from the ice and water creating microscopic organisms. Discovering hydrogen and carbon dioxide in the moons is significantly important because this combination could come from underwater microbes creating methane gas like microbes on earth. Both Europa and Enceladus have all the factors contributing to giving it the perfect possibility for those two moons to inhabit life. Not only do the oceans have similar qualities, but they also are very vast. With the endless amount of species on our planet’s oceans, there are big possibilities of the two moons holding life. No matter if it is small bacteria or an intelligent creature, the smallest sign of life on outside of Earth is groundbreaking, starting with Europa and Enceladus, the thought of extraterrestrial life will be no longer be science fiction.