TESS satellite images reveal no coma on interstellar comet 3I/ATLAS

NASA's TESS satellite images of interstellar comet 3I/ATLAS show no coma, suggesting it was inactive or had very low activity when observed. Scientists analyzed TESS data from May and June 2025, finding the comet's profile matched asteroids, indicating no detectable coma despite a mid-May brightening event. This lack of a coma in early TESS data does not rule out later activity, as any emitted gas or dust might not have become visible until after the observations concluded.