US EditionSPHEREx Detects Dramatic Ice Activity on Interstellar Visitor 3I/Atlas
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The interstellar object 3I/ATLAS was first discovered in July 2025 and came closer to the sun (perihelia) at the end of October. Further observations of 3I/ATLAS were made in December from the SPHEREx observatory, a near infrared space observatory used for spectrophotometry. The analysis of these observations was recently discussed by a [...]
SPHEREx Detects Dramatic Ice Activity on Interstellar Visitor 3I/Atlas
The NASA SPHEREx mission has revealed an extraordinary surge of sublimation activity on the interstellar comet 3I/Atlas following its passage near the Sun, according to a new paper published on arXiv. The study presents compelling evidence that the comet’s composition and activity levels changed drastically after perihelion, suggesting the exposure of new volatile materials previously locked beneath its surface. What SPHEREx Saw After Perihelion…
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