Interstellar comet 3I/ATLAS shows signs of icy volcanoes and a metal-rich interior

phys.org

Interstellar comet 3I/ATLAS may be covered in erupting icy volcanoes, challenging current theories of comet formation. Analysis suggests the comet has a metal-rich interior, which could fuel its cryovolcanic activity, unlike comets formed in our solar system. This pristine object, observed from July to November 2025, offers a unique glimpse into the formation of celestial bodies around other stars.


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