Comet 3I/ATLAS was identified as the third confirmed interstellar object after 1I/‘Oumuamua and 2I/Borisov. At the time of its discovery, the comet was faint, with a magnitude of around 17th to 18th.

Can the fastest brightening ever recorded in a comet rewrite what we know about interstellar visitors? As Comet 3I/ATLAS ...

Could a frozen traveler from another star system hold secrets about worlds beyond our own? Astronomers think 3I/ATLAS might. This comet, the only third confirmed interstellar object ever detected, ...