Astronomers believe they've detected an atmosphere around a tiny, icy world beyond Pluto
This image provided by NAOJ shows artist’s impression of the trans-Neptunian object (612533) 2002 XV93 occulting a background star. Observations of a stellar occultation in January 2024 revealed gradual fading and recovery of the starlight, providing evidence for a very thin atmosphere around the object. (Ko Arimatsu/NAOJ via AP)
CAPE CANAVERAL, Fla. (AP) — A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by volcanic eruptions or a comet strike.
Just 300 miles (500 kilometers) or so across, this mini Pluto is thought to be the solar system's smallest object yet with a clearly detected global atmosphere bound by gravity, said lead researcher Ko Arimatsu of the National Astronomical Observatory of Japan.
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