A tiny icy body beyond Neptune just upended everything astronomers thought they knew about small worlds in the outer solar system. Object 2002 XV93, barely 470 kilometers wide, has a detectable atmosphere — something that was supposed to be impossible for a body with such weak gravity. This find proves that even the smallest, most remote objects can be geologically active and scientifically surprising.
The discovery of an atmosphere around 2002 XV93 doesn't just tweak existing models — it shatters the assumption that only large bodies like Pluto can hold onto gas in the outer solar system. These distant, frozen worlds are far more dynamic than anyone gave them credit for, and this find signals that the solar system's edge is still full of unknowns worth chasing.
© 2026 Improve the News Foundation.
All rights reserved.
Version 7.4.1