NIRISS Instrument On Webb Maps An Ultra-Hot Jupiter’s Atmosphere

There’s an intriguing exoplanet out there – 400 light-years out there – that is so tantalising that astronomers have been studying it since its discovery in 2009. One orbit for WASP-18 b around its star that is slightly larger than our Sun takes just 23 hours.

There is nothing like it in our Solar System. A new study led...