Summary

These observations by NASA’s SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) show the infrared light emitted by the dust, water, organic molecules, and carbon dioxide contained within comet 3I/ATLAS’s coma. The comet brightened significantly during the December 2025 period when SPHEREx made the observations — about two months after the icy body had passed its closest distance to the Sun in late October.

AI summaries can be wrong sometimes—always verify important details using the source article.