Astronomy Picture of the Day

IRAS 04302: Butterfly Disk Planet Formation

Up from the Earth: Gigantic Jet Lightning

The Great Lacerta Nebula

The Umbra of Earth

Lunar Eclipse in Two Hemispheres

Star Trails over One-Mile Radio Telescope

Planets of the Solar System: Tilts and Spins [video]

New Comet SWAN25B over Mexico

Nebulas and Clusters in Sagittarius

Comet C/2025 R2 (SWAN)

The NGC 6914 Complex

Gibbous vs Crescent