Of all the areas in our solar system (besides Earth, naturally ), Jupiter's moon Europa may have the very best possibility of hosting life. Scientists studying the world are fascinated by its massive ocean of liquid water hiding underneath a thick icy shell, also it's potential that existence is lurking there, too.Now, a new research paper reveals that the colossal sea isn't liquid water, it's salty liquid water, making it potentially even more similar to Earth's oceans than we originally thought. The study was published in the journal Science Advances. “The potential habitability of Europa's subsurface ocean depends on its chemical composition, which might be represented because of Europa's geologically young surface,” the investigators write.But actually visiting Europa to see what its waters are created from isn't actually in the cards at the moment, so scientists have done the next best thing. Employing the potent spectrograph instrument on the Hubble, investigators can sniff out the makeup of neighboring worlds, and in the case of Europa it's very, very salty.If that the planets are indeed as succulent as they look, it may be a indication that the oceans there are suitable for life. Whether any life forms have taken root there, however, is a far more challenging question to answer.Researchers have contemplated the possibility of sending some kind of robotic probe into the world 's face. Its unbelievably thick sheet of ice would have to be penetrated in order to sample the water beneath. Such a mission could be costly, however, and while there'so plenty of interest among scientist searching for life outside of Earth, NASA and different teams are mostly focused on excursions to the Moon and Mars in the immediate future.