An icy world only 500 kilometres across beyond Neptune was found in May 2026 to possess an atmosphere that should escape within 1,000 years. Scientists suspect a recent impact or continuing cryovolcanism—but still cannot explain what created or repleni - Space Daily
Source:Space Daily
A 2024 occultation indicates that the 500-kilometre trans-Neptunian object 2002 XV93 carries a 100-to-200-nanobar atmosphere, but neither an impact nor continuing outgassing has been demonstrated.
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