But skywatchers call it Comet ZTF for short. This icy cosmic passerby is painting a green streak across the sky through the first few days of February, reaching its closest point to Earth on ...

In 2023, a green comet that last visited Earth 50,000 years ago zoomed by the planet again. Other notable flybys included ...

A bright green glow will be visible to observers in the Northern Hemisphere in the morning sky as the comet moves northwest during the month of January. Those in the Southern Hemisphere will be ...

Comet Tsuchinshan-ATLAS is arriving at its projected pinnacle of brightness, followed by a transition into the evening sky.