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Astronomy Picture of the Day
Updated: 20 min 23 sec ago

A Spectre in the Eastern Veil

14 hours 20 min ago

A Spectre in the Eastern Veil A Spectre in the Eastern Veil


Iridescent Cloud Edge Over Colorado

14 hours 20 min ago

Sometimes your eclipse viewing goes bad in an interesting way. Sometimes your eclipse viewing goes bad in an interesting way.


Retrograde Mars

14 hours 20 min ago

Why would Mars appear to move backwards?  Why would Mars appear to move backwards?


Plane, Clouds, Moon, Spots, Sun

14 hours 20 min ago

What's that in front of the Sun? What's that in front of the Sun?


Too Close to a Black Hole

14 hours 20 min ago

What would you see if you went right up to a black hole? What would you see if you went right up to a black hole?


Sunspots and Solar Eclipse

14 hours 20 min ago

Sunspots and Solar Eclipse Sunspots and Solar Eclipse


Milky Way over Devils Tower

14 hours 20 min ago

A mysterious formation known as A mysterious formation known as


AR 2192: Giant on the Sun

Thu, 10/30/2014 - 04:42

As you (safely!) watched the progress of yesterday's partial solar As you (safely!) watched the progress of yesterday's partial solar


Galaxies in Pegasus

Wed, 10/29/2014 - 00:42

Galaxies in Pegasus Galaxies in Pegasus


Sunspot Group AR 2192 Crackles

Tue, 10/28/2014 - 03:42

One of the largest sunspot groups in recent years is now crossing the Sun. One of the largest sunspot groups in recent years is now crossing the Sun.


Mimas: Small Moon with a Big Crater

Mon, 10/27/2014 - 06:42

Whatever hit Mimas nearly destroyed it.  Whatever hit Mimas nearly destroyed it.


Comet Siding Spring Passes Mars

Sun, 10/26/2014 - 02:42

Yesterday, a comet passed very close to Mars. Yesterday, a comet passed very close to Mars.


Comet McNaught Over New Zealand

Sat, 10/25/2014 - 05:42

Comet McNaught was perhaps the most photogenic comet of modern times -- from Earth.  Comet McNaught was perhaps the most photogenic comet of modern times -- from Earth.


Melotte 15 in the Heart

Fri, 10/24/2014 - 02:42

Cosmic clouds form Cosmic clouds form


Messier 6 and Comet Siding Spring

Thu, 10/23/2014 - 06:42

Messier 6 and Comet Siding Spring Messier 6 and Comet Siding Spring


Rosetta's Selfie

Wed, 10/22/2014 - 02:42

Rosetta's Selfie Rosetta's Selfie


Mysterious Changing feature on Titan

Tue, 10/21/2014 - 05:42

What is that changing object in a cold What is that changing object in a cold


Auroral Corona over Norway

Mon, 10/20/2014 - 01:42

Higher than the highest mountain lies the realm of the aurora. Higher than the highest mountain lies the realm of the aurora.


Sprite Lightning in Slow Motion

Sun, 10/19/2014 - 11:42

What causes sprite lightning? What causes sprite lightning?


The Helix Nebula from Blanco and Hubble

Sat, 10/18/2014 - 02:42

How did a star create the How did a star create the