Gravitational pull from an orbiting planet changes the radial velocity of the star's rotation, which telescopes like Webb can detect. Exoplanets also reflect light that's Doppler shifted according ...
The first exoplanet, 51 Pegasi b, had just been announced, and almost no-one believed it. The method used to detect it was indirect, the signal was small, and the data were hard to parse.
Using the James Webb Space Telescope (JWST), astronomers have characterized the atmosphere of a hot super-Neptune exoplanet designated WASP-166 b. As a result, they found that the atmosphere of this ...