“Of all the heavenly bodies, comets are assuredly those whose appearance strikes most forcibly the attention of mortals,” wrote French astronomer Camille Flammarion in his book Popular Astronomy (1894 ...

Two newly discovered comets are streaking across the sky in a spectacular display as they make their closest approaches to Earth this month. Comets are made of ice, frozen gases and rock, and as they ...

No two comets are exactly alike. Of course, they can appear similar. Two decently bright comets that share a superficial resemblance are gracing our skies right now, in fact: C/2025 A6 (Lemmon) and ...