Just recently on the dwarf planet called Ceres a atmosphere full of water vapor has been observed. This is the first planet in our solar system besides our own to have traces of water found on it. Ceres used to be the largest asteroid in our solar system but because of its size has been named as a dwarf planet. But before you make plans for your expedition to Ceres there's one problem, its in the asteroid belt between Mars and Jupiter and its very very cold. Ceres' surface is covered in ice which, when heated, releases loads of water vapor into the planets atmosphere. If melted the ice could yield more fresh water than what we have on earth.