Both Pluto and Charon are more than three billion miles from the sun.

NEW YORK (AP) — NASA’s Webb Space Telescope has identified new clues about the surface of Pluto’s largest moon. It detected for the first time traces of carbon dioxide and hydrogen peroxide on the surface of Charon, which is about half Pluto’s size. Previous research, including a flyby from NASA’s New Horizons spacecraft in 2015, […]

NASA’s Webb Space Telescope has identified new clues about the surface of Pluto’s largest moon.

NASA's Webb Space Telescope has identified new clues about the surface of Pluto's largest moon.

Astronomers have detected carbon dioxide and hydrogen peroxide on the frozen surface of Pluto's largest moon, Charon, using observations from the James Webb Space Telescope. These discoveries add to Charon's known chemical inventory, previously identified by ground- and space-based observations, that includes water ice, ammonia-bearing species and the organic materials responsible for Charon's gray and red coloration.