Astronomers Have Discovered Earth’s Latest Quasi-Lunar Moon

As mankind was planning the first moon landing in the 1960s, an asteroid approached Earth—and still hasn’t left.

Last chance tonight: two green comets light up the sky — see Lemmon and SWAN before they vanish for 1,150 years, here’s when to watch

Tonight, the sky will light up with a rare spectacle. Two bright green comets, C/2025 A6 (Lemmon) and C/2025 R2 (SWAN), are ...