Southern Craters and Galaxies
The Henbury craters in the Northern Territory, Australia, planet Earth, are the scars of an impact over 4,000 […]
Astronomy
Star Colors and Pinyon Pine
Beautiful, luminous decorations on this pinyon pine tree are actually bright stars in the constellation Scorpius and the […]
Geminid Meteors over Xinglong Observatory
Where do Geminid meteors come from? In terms of location on the sky, as the featured image composite […]
SN Refsdal: The First Predicted Supernova Image
It’s back. Never before has an observed supernova been predicted. The unique astronomical event occurred in the field […]
A Dark Earth with a Red Sprite
There is something very unusual in this picture of the Earth — can you find it? A fleeting […]
Star Streams and the Whale Galaxy
NGC 4631 is a spiral galaxy found only 25 million light-years away, toward the well-trained northern constellation Canes […]
Herbig Haro 24
This might look like a double-bladed lightsaber, but these two cosmic jets actually beam outward from a newborn […]
Geminids of the South
Earth’s annual Geminid meteor shower did not disappoint, peaking before dawn on December 14 as our fair planet […]
The Horsehead Nebula
The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the […]
Colorful Arcs over Buenos Aires
What are those colorful arcs in the sky? Like rainbows that are caused by rain, arcs of sunlight […]