A long-period comet that hasn’t been near Earth for 50,000 years is now visible with the naked eye. The comet known as C/2022 E3 (ZTF) is a dazzling green color chiefly because of the presence ...

Comet C/2022 E3 (ZTF) last passed Earth 50,000 years ago. If you're looking at the night skies Wednesday and make out a tiny green light in the sky, don't panic, aliens haven't landed. A rare ...

People in the Northern Hemisphere will soon be able to get a glimpse of a comet that hasn't been visible on Earth for more than 400 years. The rare green comet, named Nishimura after the amateur ...