Celestial Objects

Comets Planets Stars Star Clusters Asteroids Moon Galaxies Constellations Nebulae Interstellar Objects Nebulas Sun Moons Meteors Oumuamua Apophis Brown Dwarfs Milky Way Oort Cloud Objects Asteroids and Comets Saturn Asteroid Orbits Jupiter Comet Solar System Oort Cloud Trojan Asteroids Triple-Star System

ZWO Astronomy Photographer of the Year Releases 29-Image Shortlist

A panel of art and astronomy experts will judge the shortlisted work and announce winners on September 17.

Comet Pan‑STARRS Reaches Perihelion Sunday, Closing a Brief Pre‑Dawn Viewing Window

Southern Hemisphere Sky Guide: What to See in April 2026

Hubble–Euclid Team-Up Unveils Multiscale Portrait of the Cat’s Eye Nebula

Quadrantids Set to Peak Jan. 3–4, but Full Moon Will Mute the Show

Geminid Meteor Shower Peaks Dec. 13–14 With Dark Skies and Up to 150 Meteors an Hour

Comet Lemmon Stays Bright as Final Easy Viewing Window Closes

Twin Comets Lemmon and SWAN Light Up Northern Skies as Brief Viewing Window Peaks

Twin Green Comets Enter Prime Viewing Week Before Closest Approaches

Comets Lemmon and SWAN Poised for Best Viewing Oct. 20–21