Formado há dez a 12 mil milhões de anos, nos primórdios do Universo, o cometa interestelar 3I/ATLAS é provavelmente o objecto mais antigo alguma vez observado a atravessar o sistema solar.

Interstellar comet, 3I/ATLAS, might be one of the oldest celestial bodies ever seen, potentially forming 10 to 12 billion years ago. This ancient visitor, detected in July 2025,…

The evidence is mounting: this interstellar visitor is even older and weirder than anyone thought