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3I/ATLAS Shows Signs of Full Cometary Awakening after Perihelion

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Jan 19, 2026 - 21:45
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3I/ATLAS Shows Signs of Full Cometary Awakening after Perihelion
The SPHEREx 0.75-5.0μm imaging of 3I/ATLAS taken on December 8 to 15, 2025. Image credit: NASA / arXiv: 2601.06759 / Lisse et al., arXiv: 2601.06759.

According to new observations by NASA’s SPHEREx mission, the interstellar object 3I/ATLAS has dramatically changed its behavior, developing the hallmarks of a fully active comet after a close encounter with the Sun.

The post 3I/ATLAS Shows Signs of Full Cometary Awakening after Perihelion appeared first on Sci.News: Breaking Science News.

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