Astronomers report growing evidence that interstellar object 3I/ATLAS is exceptionally ancient. Based on observations and analyses described by multiple outlets, the comet-like body appears to be up to roughly 12 billion years old, placing it among the oldest known objects of its kind. The findings suggest the material making up or surrounding the object has been preserved for most of the universe’s history rather than being recently formed.
Both reports emphasize that interpretations of the age rely on scientific measurements and modeling of the object’s characteristics, including how its properties compare with expectations for bodies formed at different times and under different conditions. The Scientific American piece describes the case as “mounting,” indicating that earlier estimates may have been revised upward as more evidence became available or as analysis improved.
The coverage also characterizes the object as not only very old but “weird” in the sense that it does not match simple expectations for interstellar visitors, reinforcing the idea that additional study is needed to fully explain its origin and evolution.
