Comet 3I/ATLAS reappears in the predawn sky, showing a strange, complex tail in new images. (Michael Buechner, Frank Niebling) Amateur astronomers across Europe have reported similar sightings.
As it slips back into deep space, the interstellar comet 3I/ATLAS is behaving in ways that defy expectations. Instead of ...
Comet 3I/ATLAS is drawing unusual attention because it doesn't behave the way most comets do in photographs and time-series imaging. As it heads back out of the inner solar system, astronomers are ...