Conditions are near-perfect to spot this celestial visitor, which won't appear again in our night sky for another millennium.

"Current models are showing the [Lemmon] comet will likely peak between 3.5 and 4.5 magnitudes when it is nearest to Earth on October 21, which is dimmer than what they showed last week," Saint Louis ...

Astronomers discovered Comet C/2025 A6 (Lemmon) on Jan. 3 using a 60-inch telescope located at the Mt.Lemmon Observatory in ...

The new comet, called C/2025 R2 (SWAN), was first observed in September A new comet discovered in mid-September may soon be ...

C/2025 A6 (Lemmon) is the brightest of the three and was discovered on Jan. 3, 2025 by astronomers using the Mount Lemmon telescope near Tucson, Ariz. Initially, it wasn't expected to become ...

A new comet was discovered in early September, now it could start becoming visible this month for skywatcher.

Comet Lemmon and Comet SWAN will be closest to Earth as a new moon sets up prime viewing conditions. Add in a meteor shower ...

Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest ...

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The comet is now closing in on a flyby of Mars next month, before reaching its minimum distance ...

Since its discovery, astronomers have been frantically trying to gather as much information as they can about the newest interstellar interloper dubbed 3I/ATLAS. It's been challenging, but they've ...