NASA has been discovering one exoplanet after another these days, but its scientists have to look a lot closer if they want to see more details, such as the planets' color or whether they have water. That's exactly what the agency did while observing HAT-P-11b -- by combining the power of three space telescopes, scientists have found clear skies and water vapor on the atmosphere of the Neptune-sized exoplanet. NASA observed the distant world while it was crossing its solar system's sun using one of Hubble's wide field cameras. Water vapor typically absorbs starlight during that process, and it's that light that reaches our telescopes. In order to confirm whether it's actually water vapor (mixed with hydrogen gas and other molecules), the scientists compared Hubble's data to visible-light data collected by Kepler and Spitzer light data taken at infrared wavelengths.