In 2026, skywatchers can anticipate multiple comet sightings, including potentially naked-eye visible ones like C/2025 R3 ...

If you’ve not seen the two green comets yet, 90 minutes after sunset on Sunday, Oct. 26, is your last best chance before they fade. The brighter Comet Lemmon (C/2025 A6) and much dimmer Comet SWAN ...

In the fall of 2023, Unistellar observers joined forces with the Association Française d’Astronomie (AFA) to take another close look at a familiar visitor: Comet 103P/Hartley 2. This tiny but famously ...

The interstellar comet 3I/ATLAS made its closest approach to Earth today (Dec. 19, 2025). Here's the latest news you need to ...

An interstellar comet named 3I/ATLAS, originating from outside our solar system, is passing through. NASA recently released new images of the comet, which is being studied by astronomers worldwide.

A strange, city-sized comet seems to have woken up early as it drifts toward the sun — even though it's still much farther than Saturn in space. Using a giant Chilean desert telescope, the Atacama ...

SANTA ROSA, Calif. - Comet C/2023 A3 (Tsuchinshan-ATLAS), the comet some call the ‘comet of the century’, was captured soaring across the sky above Santa Rosa by KTVU photographer Jaden Schaul. On ...

On Jan. 12, NASA astronaut Don Pettit on the International Space Station sent back an image of comet C/2024 G3 (ATLAS). A comet that hasn’t been in the inner solar system for around 180,000 years and ...

It came from outer space. Interstellar space, to be precise. From somewhere beyond the influence of our sun, possibly from ...

Astronomers are hustling to use interplanetary spacecraft to study the interstellar comet dubbed 3I/ATLAS while the sun is hiding it from Earth When Comet 3I/ATLAS roared into the solar system this ...

On July 2, 1985, the European Space Agency launched the Giotto space probe to get a close-up look at Halley's Comet. Nearly nine months later on March 14, 1986, Giotto became the first spacecraft to ...