Webb Telescope reveals surprising chemistry of interstellar Comet 3I/ATLAS
Summary
The James Webb Space Telescope has captured detailed chemical measurements of interstellar Comet 3I/ATLAS as it moved away from the Sun in December 2025. The comet, the third interstellar object identified in human history, was observed after its closest pass by the Sun, revealing a surprising chemical makeup that challenges assumptions about how common or unusual conditions in our own Solar System may be. The findings raise questions about the diversity of chemical environments across planetary systems.
Source
bskyWebb Telescope reveals surprising chemistry of interstellar Comet 3I/ATLASesa.intKey quotes
· 3 pulledThe third identified interstellar comet in human history has a surprising chemical makeup, raising questions as to how common, or unusual, conditions in our own Solar System may be.
As interstellar Comet 3I/ATLAS began moving away from the Sun in December 2025, astronomers took the opportunity to turn the powerful NASA/ESA/CSA James Webb Space Telescope in its direction and capture detailed measurements of its chemical components.
The comet was freshly warmed from its closest pass by the Sun, and its ancient...
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