Chicago-area residents could be treated to a wonderful nighttime display as Comet Lemmon makes its closest approach to Earth in coming days.

Skywatchers can catch a rare glimpse of Comet Lemmon this month, and it won't be back until around the year 3175. Here's how ...

Comet Lemmon will have its closest brush with Earth on or around Tuesday, Oct. 21. Comet SWAN should have its flyby with ...

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

Harvard astronomer Avi Loeb currently says there is a 30-40 percent chance the object is not natural in origin.

Despite data suggesting interstellar object 3I/ATLAS is simply a comet, Harvard astronomer Avi Loeb still thinks something is ...

TOLEDO, Ohio — Skywatchers have a rare cosmic visitor to look forward to this month. Comet C/2025 R2 (SWAN), first spotted in September by NASA’s Solar Wind Anisotropies instrument aboard the SOHO ...

Avi Loeb, the Harvard astrophysicist known for his bold theories on extraterrestrial life, now suggests that the mysterious interstellar object 3I/ATLAS may have been behind one of the most famous ...

CAPE CANAVERAL, Fla. (AP) — A comet from another star system will swing by Mars on Friday as a fleet of spacecraft trains its sights on the interstellar visitor. The comet known as 3I/Atlas will ...

CAPE CANAVERAL, Fla. (AP) — A comet from another star system will swing by Mars on Friday as a fleet of spacecraft trains its sights on the interstellar visitor. SpaceX launches the 11th test flight ...