Comet C/2022 E3 (ZTF) with a short third tail (to the left of the comet) and longer gas and dust tails (to the right of the comet) on Jan. 21. A rare green comet, which has been streaking across the ...

Radio galaxies and quasars look different and have been traditionally classified as different objects. But for quite some time now, many astronomers have suspected that those differences are not real ...

A rare green comet, which has been streaking across the night sky as it approaches Earth for the first time since the Stone Age, briefly grew a bizarre third tail. This "anti-tail" appeared to streak ...