Astronomers say 3I/Atlas, the interstellar object passing through our solar system, has changed color again, raising new questions about its composition and behavior.

Experience the brilliance of comet C/2023 A3, visible nightly this October, with its closest approach to Earth on October 12.

As 3I/ATLAS moved closer to the Sun, it raised doubts about whether it’s following a natural path or performing an Oberth Maneuver ...

A rare encounter of two comets this week will have stargazers in awe after nearly a year of no easily seen comets.

Comet Lemmon can be found west of the Big Dipper, beyond bright star Arcturus, while Comet SWAN is moving towards Saturn, and ...

Comet Lemmon is moving quickly west of the Big Dipper, near bright Arcturus, while Comet SWAN lies beneath the three stars ...

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 ...

Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere. Both hail from the outer edges of our solar system — possibly what's known as the Oort ...

Skywatchers are in for a rare celestial treat this week as two green comets — Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) , glide through the night skies, offering binocular viewers a striking ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...