Recently, scientists discovered an exoplanet the size of Neptune that has water. The planet, HAT-P-11b, is roughly four times the size of Earth. It is the smallest known exoplanet to have water, as all the exoplanets outside our solar system that have been found to contain water are the size of jupiter. Scientists were able to discover the presence of water vapor due to its ability to absorb infrared light whenever it passed in front of the star it was orbiting. Currently, the possibility of other worlds containing living conditions similar to our own world is extremely important. We are constantly searching to prove the question “are we alone in the universe”. Only recently, however, have we been able to start finding these exoplanets. With the discovery of each new exoplanet we learn more and more about our universe, and the possibility of other habitable worlds. This newly discovered exoplanet may not be habitable, but the mere presence  of water on it allows us to realize there is a good chance that there are many worlds similar to ours with the possibility of sustaining life.