Astronomy Picture of the Day: Blue Moon Tree

Does an alignment like this occur only once in a blue moon?

Astronomy Picture of the Day: Mars Between Nebulas

What's that bright red spot between the Lagoon and Trifid Nebulas?

Astronomy Picture of the Day: The Coma Cluster of Galaxies

Almost every object in the above photograph is a galaxy

Astronomy Picture of the Day: Announcing Nova Carinae 2018

How bright will Nova Carinae 2018 become?

Astronomy Picture of the Day: NGC 602 and Beyond

Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602

Astronomy Picture of the Day: Sharpless 249 and the Jellyfish Nebula

Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic image

Astronomy Picture of the Day: NGC 253: Dusty Island Universe

Shiny NGC 253 is one of the brightest spiral galaxies visible, and also one of the dustiest. Some call it the Silver Dollar Galaxy for its appearance in small telescopes, or just the Sculptor Galaxy for its location within the boundaries of the south

Astronomy Picture of the Day: Camera Orion

Do you recognize this constellation?

Astronomy Picture of the Day: Chicagohenge: Equinox in an Aligned City

Sometimes, in a way, Chicago is like a modern Stonehenge

Astronomy Picture of the Day: The Nebra Sky Disk

Some consider it the oldest known illustration of the night sky

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