Discovery of Atmosphere on Distant Trans-Neptunian Object Challenges Expectations
A team of astronomers in Japan has discovered that a small object in the outer Solar System, known as 2002 XV 93, has a thin atmosphere. This finding is unexpected because the object is too small to retain gas for long periods, raising questions about how and when the atmosphere formed. The discovery was made during a stellar occultation event, where the object passed in front of a background star, allowing scientists to detect the presence of an atmosphere through gradual dimming of the starlight. The atmosphere is believed to be short-lived, suggesting it must have formed or been replenished recently. 
