JWST Finds Hints of a Hidden Exomoon in TOI-700 Amid Stellar Noise

A study using the James Webb Space Telescope of the TOI-700 system—home to Earth-sized worlds in the habitable zone—improved orbital timing and planet radii but found no definitive exomoon signal because stellar red noise from granulation (about 46 ppm, ~16 minutes) masks any moon’s subtle signal. The data could still harbor an Earth-like moon, awaiting advanced data-processing methods to remove the star’s noise, which would unlock detections without new observations.