Using spectral data from Webb’s Near-Infrared Spectrograph (NIRSpec), astronomers determined that the warm super-Earth Gliese 486b either has a water-rich atmosphere or the exoplanet’s spectrum is contaminated by water present in cool starspots of the parent star Gliese 486. This graphic shows the transmission spectrum obtained by Webb of the warm super-Earth exoplanet Gliese 486b. Image credit: NASA / ESA / CSA / J. Olmsted, STScI / S. Moran,...
