Sentences with phrase «substellar objects in the outer solar system»

In addition, Ceres» light spectrum suggests that it may have ammonium - rich clay at the surface, which would fit the expected ammonia - rich composition of large, differentiated substellar objects in the outer Solar System, including the «plutoids» defined on June 11, 2008 by the International Astronomical Union (IAU) as a new class of bright «dwarf planets beyond the orbit of Neptune (IAU press release).