Comet Lemmon will be visible from mid-October through early November, with its best viewing window peaking around Oct. 21 when it makes its closest approach to Earth. However, as it quickly approaches ...

The comet, which continues its journey through the solar system, has been observed by space telescopes near Earth.

An alien comet passing through our solar system made its closest approach to Mars recently, and two European robotic spacecraft orbiting the red planet turned to take a look.

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

This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system ...

Comet C/2025 R2 (SWAN) is a new visitor from our outer solar system. It may be easier to see as it approaches Earth next week.

The comet-like object Chiron has been caught in the process of forming new rings, which could help us understand how these ...

On Thursday, October 16, 2025, skywatchers have a prime opportunity to witness Comet Lemmon (C/2025 A6) as it glides through ...

3I/ATLAS could easily have been knocked off its original trajectory by the gravity of massive stars intervening in its path.

Comet Lemmon is currently racing toward the Sun, while the fainter Comet SWAN is moving away. Both are set to make their ...

NASA's Perseverance Mars rover may have captured an image of interstellar comet 3I/ATLAS streaking across the sky above the Red Planet.

Comet Lemon will be in the heart of the constellation Boötes, the Herdsman, as it makes its closest approach to Earth on Oct.