Opening with a statistic that seems almost absurd, comet 3I/ATLAS is losing water at a rate of about 40 kilograms per second about what would come out of a fire hose blasting full force and at a ...

Comet C/2025 A6 — also known as Lemmon — will make its closest approach to Earth on Tuesday night, Oct. 21, and will continue ...

Fifteen years ago on this day, the comet Hale-Bopp made its closest approach to Earth, at a distance of 1.315 AU (1 AU = 93 million miles). The comet had been discovered independently by two amateur ...

Comet SWAN, also known as C/2025 R2, was spotted in September by an amateur astronomer using photos from a spacecraft operated by NASA and the European Space ... flybys included Neowise in 2020 and ...

Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere.

T he best time to watch Comet C/2025 A6 (Lemmon) is upon us. Grab your binoculars, telescope, or just get into a very dark ...

Comet Lemmon, also designated C/2025 A6, was discovered in January by a telescope scouring the night sky for near-Earth asteroids. Comet SWAN, also known as C/2025 R2, was spotted in September by an ...

CAPE CANAVERAL, Fla. — NASA has discovered an interstellar comet that’s wandered into our backyard. The space agency spotted the quick-moving object with the Atlas telescope in Chile recently, and ...

CAPE CANAVERAL, Fla. — NASA has discovered an interstellar comet that’s wandered into our backyard. The space agency spotted the quick-moving object with the sky-surveying Atlas telescope in Chile ...