Ian Wong

Chiron releases methane from its depths, carbon dioxide from the surface, and carbon monoxide is locked inside. This reshapes models of how icy bodies behave.

Neptune's third-largest moon, Nereid, was long counted among the icy intruders from the Kuiper Belt. But its unique infrared spectrum, captured by the James Webb Space Telescope, is unlike any other: crystalline water ice with a reddish tint and traces of carbon dioxide hint at a birth near the plan