trans-Neptunian object

Scientists Discover Thin Atmosphere on Small Trans-Neptunian Object 2002 XV93

Astronomers have detected a thin atmosphere around 2002 XV93, a small trans-Neptunian object beyond Pluto. The discovery challenges assumptions that only larger icy bodies can retain gaseous envelopes, suggesting that even modest objects may develop atmospheres through processes like cryovolcanism or impacts.