Comet 3I/ATLAS Latest Update: In a historic cosmic discovery, NASA has detected the chemical “fingerprint” of water on interstellar comet 3I/ATLAS, a rare visitor from beyond our Solar System. Scientists believe this breakthrough could reshape our understanding of how planetary systems form and whether life’s essential ingredients exist across the galaxy. Comet 3I/ATLAS Latest Update: In a historic cosmic discovery, NASA has detected the chemical “fingerprint” of water on interstellar comet 3I/ATLAS, a rare visitor from beyond our Solar System. Scientists believe this breakthrough could reshape our understanding of how planetary systems form and whether life’s essential ingredients exist across the galaxy.