Astronomers using the NASA/ESA/CSA James Webb Space Telescope have detected phosphine (PH 3 ) in the atmosphere of Wolf 1130C, a metal-poor brown dwarf within the triple system Wolf 1130ABC. Also known LHS 482, Gliese 781 and Ross 1069b, this system consists of three components: the cool red star Wolf 1130A, the massive white dwarf Wolf 1130B, and the brown dwarf Wolf 1130C. First discovered in 2013, Wolf 1130C follows a wide orbit around the tight double system of Wolf 1130A and Wolf 1130B. Unlike other brown dwarfs, the authors spotted phosphine in Webb’s infrared spectral data of Wolf 1130C. Observation of undepleted phosphine in the atmosphere of a low-temperature brown dwarf.