A Tale of two Exoplanets 2 (IMAGE) NASA/Goddard Space Flight Center Caption This diagram compares Hubble Space Telescope observations of two 'hot Jupiter'-class planets orbiting very closely to different sunlike stars. Astronomers measured how light from each parent star is filtered through each planet's atmosphere. HAT-P-38 b did have a water signature indicated by the absorption-feature peak in the spectrum. This is interpreted as indicating the upper atmosphere is free of clouds or hazes. WASP-67 b, has a flat spectrum that lacks any water-absorption feature, suggesting most of the planet's atmosphere is masked by high-altitude clouds. Credit Credits: Artwork: NASA, ESA, and Z. Levy (STScI); Credit: Science: NASA, ESA, and G. Bruno (STScI) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.