Breaking space news, the latest updates on rocket launches, skywatching events and more! You are now subscribed Your newsletter sign-up was successful Want to add more newsletters? The interstellar comet that recently dominated headlines, 3I/ATLAS, could be between 10 and 12 billion years old, a new assessment of the comet's isotopic composition has shown. This so-called "invader" in our solar system is only the third object on record to enter our cosmic neighborhood from beyond. If these new age estimates of the comet are true, they would suggest 3I/ATLAS was born within a few billion years of the birth of the Milky Way. When it was discovered in 2025, 3I/ATLAS was speeding in at 36 miles (58 kilometers) per second relative to the sun. It is the fastest comet ever seen, vastly exceeding the velocities of its predecessors 1I/'Oumuamua and 2I/Borisov.…