Surprise! Three planets believed to be good candidates for having water vapor in their atmosphere actually have much lower quantities than expected. The planets (HD 189733b, HD 209458b, and WASP-12b) are “hot Jupiters” that are orbiting very close to their parent star, at a distance where it was expected the extreme temperatures would turn water … Continue reading "Hubble Finds 3 (Relatively) Dry Exoplanets, Raising Questions About Water Outside The Solar System"