Tholin 托林 (天文学)
(重定向自Tholins)
Tholins (after the ancient Greek word θολός (tholós) meaning "sepia ink") are a class of heteropolymer molecules formed by solar ultraviolet irradiation of simple organic compounds such as methane or ethane. Tholins do not form naturally on modern-day Earth, but they are found in great abundance on the surface of icy bodies in the outer Solar System. They usually have a reddish-brown appearance.