Although significantly more common in the Universe, ultra-cool dwarf stars remain poorly understood due to their low luminosity.

An international team of researchers, including members from CEA, utilized NASA's James Webb Space Telescope to map the weather of the hot gas giant WASP-43 b.

The Astrophysics Department of CEA-Irfu, which has scientific and technical responsibility for the MIRIM imager (Mid Infrared Imager) on the MIRI spectro-imager, one of the major instruments of the forthcoming James Webb Space Telescope (JWST), has just delivered the final model of the imager to the Appleton Rutherford laboratory in England, who will carry out the final test before the delivering it for integration into the JWST at the start of 2011 [1].