Webb spotted a subtle difference in the interstellar comet's ice, suggesting dustier grains

The James Webb Space Telescope (JWST) has observed interstellar comet 3I/ATLAS, revealing that its ice grains appear dustier than those found in comets native to our solar system. This subtle difference in water ice signatures, where two faint spectral marks were barely detected or missing, suggests that tiny bits of ice are blended with more dust, blocking light penetration.