Puffed-up, low-mass planet WASP-127b is one of the best targets for atmospheric characterisation. Recently Chen etal have announced the results of observations taken with the La Palma telescopes the Gran Telescopio Canarias and the Nordic Optical Telescope.

The result is one of the most detailed and featured spectra of an exoplanet yet.

The spectrum clearly shows the metals sodium (Na), lithium and potassium (K), along with features due to water and haze. A press release from the University of Cambridge has led to coverage of the paper on several dozen websites.

The Instituto de Astrofisica de Canarias have also produced this artist’s depiction of WASP-127b and its host star: