When the James Webb Space Telescope was first dreamed up, exoplanets hadn’t even been discovered yet. Now the observatory is showing astronomers what it can learn about planets orbiting other stars — including the small ones.
And JWST is starting to find new rocky worlds too.
One of the smaller planets that JWST looked at is GJ 1214b, which has frustrated astronomers since its . “What we’d like to do with atmospheric characterization is measure their atmospheres and see which is which,” Kempton said. But TRAPPIST-1 is a small, red star called an M dwarf, a type of star that is notorious for violent flares and strong radiation. For years, astronomers have debated whether“If the TRAPPIST planets don’t have atmospheres, then we need to move on” from M dwarfs in the search for extraterrestrial life, says astronomer Mercedes Lόpez-Morales of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass., who was not involved in the new JWST observations.
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