Atmospheric spectra of three hot Jupiters showing water absorption

This graph compares observations with modeled infrared spectra for three hot-Jupiter-class exoplanets. These exoplanets were spectroscopically observed with the NASA/ESA Hubble Space Telescope. The red curve in each case is the best-fit model spectrum for the detection of water vapor absorption in the planetary atmosphere. The blue circles and error bars show the processed and analysed data from Hubble's spectroscopic observations.

Links:

• NASA Press release
• Artist's impression of the hot planet Osiris