Webb Telescope Reveals Unusual Ice Composition on Interstellar Comet 3I/ATLAS

Observations by NASA's James Webb Space Telescope have revealed an unusual composition of water ice on the interstellar comet 3I/ATLAS. Unlike typical comets in our solar system, 3I/ATLAS showed faint or absent spectral marks for water ice, suggesting that tiny ice bits are blended with more dust, which blocks light from penetrating deeply through the ice. This finding offers new insights into the formation history of comets from other star systems.