DECEMBER

Nebulae in Auriga

Golden Gate Sunset: Green Flash

Enceladus: Ringside Water World

Cygnus: Bubble and Crescent

Kepler Orrery IV

A Force from Empty Space: The Casimir Effect

Comet Catalina Emerges

Icelandic Legends and Aurora

Arp 87: Merging Galaxies from Hubble

Daytime Moon Meets Morning Star

The Brightest Spot on Ceres

Comet Meets Moon and Morning Star

When Gemini Sends Stars to Paranal

Pluto: From Mountains to Plains

Colorful Arcs over Buenos Aires

The Horsehead Nebula

Geminids of the South

Herbig-Haro 24

Star Streams and the Whale Galaxy

A Dark Earth with a Red Sprite

SN Refsdal: The First Predicted Supernova Image

Solstice Illuminated: A Year of Sky

Geminid Meteors over Xinglong Observatory

Star Colors and Pinyon Pine

To Scale: The Solar System

Southern Craters and Galaxies

Doomed Star Eta Carinae

Falcon 9 First Stage Landing

Dust of the Orion Nebula

The Fox Fur Nebula

Solstice Sun at Lulworth Cove