Triton and Pluto, at left (not to scale), may be missing siblings.
JPL/NASA//Johns Hopkins Applied Physics Laboratory/Southwest Research Institute
An analysis of Neptune’s largest moon, Triton, and the dwarf planet Pluto may have had a common origin before separating in the early solar system, suggests a study of their compositions.
Both Triton and Pluto have been visited by spacecraft before: the former by NASA’s Voyager 2 in 1989, and the latter by NASA’s New Horizons spacecraft in 2015. Both are icy bodies smaller than Earth’s Moon, with similar densities, and both are believed to have once had subsurface oceans…
Source: www.newscientist.com
