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Astronomy Picture of the Day
Updated: 3 days 6 hours ago

Auroras and Star Trails over Iceland

Tue, 05/19/2015 - 02:42

It was one of the quietest nights of aurora in weeks. It was one of the quietest nights of aurora in weeks.


NGC 2440: Pearl of a New White Dwarf

Tue, 05/19/2015 - 02:42

 Pearl of a New White Dwarf NGC 2440: Pearl of a New White Dwarf


Ares 3 Landing Site: The Martian Revisited

Tue, 05/19/2015 - 02:42

 The Martian Revisited Ares 3 Landing Site: The Martian Revisited


Jupiter, Ganymede, Great Red Spot

Tue, 05/19/2015 - 02:42

In this sharp snapshot, In this sharp snapshot,


Dwarf Planet, Bright Spot

Tue, 05/19/2015 - 02:42

Dwarf Planet, Bright Spot Dwarf Planet, Bright Spot


The Magnificent Horsehead Nebula

Tue, 05/19/2015 - 02:42

The Magnificent Horsehead Nebula The Magnificent Horsehead Nebula


Globular Star Cluster 47 Tuc

Tue, 05/19/2015 - 02:42

Globular star cluster 47 Tucanae is a jewel box of the southern sky. Globular star cluster 47 Tucanae is a jewel box of the southern sky.


Two Worlds One Sun

Mon, 05/18/2015 - 05:42

How different does sunset appear from Mars than from Earth? How different does sunset appear from Mars than from Earth?


The Sky from Mauna Kea

Sun, 05/17/2015 - 01:42

What if you could stand at the top of a volcano and peer out across the universe? What if you could stand at the top of a volcano and peer out across the universe?


MyCn18: An Hourglass Planetary Nebula

Sat, 05/16/2015 - 04:42

The sands of time are running out for the central star The sands of time are running out for the central star


Trio Leo

Fri, 05/15/2015 - 07:42

This popular group is famous as the This popular group is famous as the


When Vega is North

Thu, 05/14/2015 - 03:42

In only about 12,000 years In only about 12,000 years


At the Limit of Diffraction

Wed, 05/13/2015 - 06:42

Did you ever want to just look through the eyepiece of Did you ever want to just look through the eyepiece of


Summer Triangles over Japan

Tue, 05/12/2015 - 02:42

Have you ever seen the Summer Triangle? Have you ever seen the Summer Triangle?


Gravitational Anomalies of Mercury

Mon, 05/11/2015 - 06:42

What's that under the surface of Mercury? What's that under the surface of Mercury?


An Unexpected Aurora over Norway

Sun, 05/10/2015 - 03:42

Sometimes the sky lights up unexpectedly. Sometimes the sky lights up unexpectedly.


Moonrise Through Mauna Kea's Shadow

Sat, 05/09/2015 - 06:42

Moonrise Through Mauna Kea's Shadow   Moonrise Through Mauna Kea's Shadow


M51: The Whirlpool Galaxy

Fri, 05/08/2015 - 02:42

Follow the handle of Follow the handle of


MESSENGER's Last Day on Mercury

Thu, 05/07/2015 - 05:42

MESSENGER's Last Day on Mercury MESSENGER's Last Day on Mercury


Across the Sun

Wed, 05/06/2015 - 01:42

A long solar filament stretches across the relatively calm A long solar filament stretches across the relatively calm