Browse NASA Astronomy Picture of the Day archive by date and media: Archive Discoveries
Browse the NASA APOD archive without needing the exact date first. Filter by media type and keep moving deeper into older images and videos.
Autumn Moon Encore
Near its northernmost declination, tonight's Full Moon will be a special one, arcing high in northern hemisphere skies. But a Full Moon won't occur on this calendar date for…
A Digital Opportunity Rover on Mars
If you could see one of the robot rovers currently rolling across Mars, what would it look like? To gain this perspective useful in planning explorations, the above synthetic…
620 Kilometers Above Rhea
What does the surface of Saturn's moon Rhea look like? To help find out, the robot Cassini spacecraft currently orbiting Saturn was directed to fly right past the second largest…
30 Doradus: The Tarantula Zone
The Tarantula Nebula is more than 1,000 light-years across - a giant emission nebula within our neighboring galaxy the Large Magellanic Cloud . Inside this cosmic arachnid lies a…
R136: The Massive Stars of 30 Doradus
In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. These stars, known as the star cluster R136 , and part of…
The Last Moon Shot
In 1865 Jules Verne predicted the invention of a space capsule that could carry people. His science fiction story “From the Earth to the Moon” outlined his vision of a cannon in…
December Moon Meets Evening Star
If you've been outdoors near sunset, then you've probably noticed Venus low in the west as the brilliant evening star . Sometimes mistaken for a tower light near the horizon,…
X-Rays from the Perseus Cluster Core
The Perseus Cluster of thousands of galaxies, 250 million light-years distant, is one of the most massive objects in the Universe and the brightest galaxy cluster in the x-ray sky…
Europe at Night
Can you find your favorite European city? The above digital fantasy of Europe at Night is a digital composite of archived satellite images taken both during the day and night.…
The Veil Nebula Unveiled
These wisps of gas are all that remain visible of a Milky Way star. Many thousands of years ago that star exploded in a supernova leaving the Veil Nebula , pictured above . At the…
Fountains Discovered on Saturn's Enceladus
Fountains of ice shoot out from Saturn's moon Enceladus. Clear discovery images of the fountains were made using observations from the robot Cassini spacecraft currently orbiting…
Proxima Centauri: The Closest Star
What is the closest star to our Sun ? It is Proxima Centauri , the nearest member of the Alpha Centauri triple star system . Light takes only 4.22 years to reach us from Proxima…
Astro 1 In Orbit
Fifteen years ago, in December of 1990, the Space Shuttle Orbiter Columbia carried an array of astronomical telescopes high above the Earth's obscuring atmosphere to explore the…
Crab Nebula Mosaic from HST
The Crab Nebula is cataloged as M1, the first object on Charles Messier's famous list of things which are not comets. In fact, the cosmic Crab is now known to be a supernova…
SOHO's Uninterrupted View of the Sun
Launched ten years ago this week, SOHO (the SOlar and Heliospheric Observatory) still enjoys an uninterrupted view of the Sun. Twelve sungazing instruments on board the spacecraft…
Reflections on the Horsehead Nebula
Sculpted by stellar winds and radiation, a magnificent interstellar dust cloud by chance has assumed this recognizable shape. Fittingly named the Horsehead Nebula , it is some…
Simeis 147: Supernova Remnant from Palomar
It's easy to get lost following the intricate filaments in this detailed image of faint supernova remnant Simeis 147. Seen towards the constellation Taurus it covers nearly 3…
Vista Inside Gusev Crater on Mars
What is the geologic history of Mars? To help find out, the robot Spirit rover explored the terrain on the way up to the top of Husband Hill and took pictures along the way.…
Light Echoes from V838 Mon
What caused this outburst of V838 Mon? For reasons unknown, star V838 Mon 's outer surface suddenly greatly expanded with the result that it became the brightest star in the…
A Stereo Sun
A stereo view of the closest star , this creatively composited image was constructed from an extensive archive of pictures taken between March 2004 and April 2005. When viewed…
Moon Over Antarctica
Last week, the nearly Full Moon set along the northern horizon - as seen from Davis Station , Antarctica . The squashed orange pumpkin shape just silhouettes the peak of a distant…
Dusty NGC 1333
Dusty NGC 1333 is seen as a reflection nebula in visible light images, sporting bluish hues characteristic of starlight reflected by dust. But at longer infrared wavelengths, the…
Pandora: A Shepherd Moon of Saturn
What does Saturn's small moon Pandora look like? To help find out, the robot Cassini spacecraft now orbiting Saturn passed about 50,000 kilometers from the unusual moon in early…
Galactic Collision in Cluster Abell 1185
What is a guitar doing in a cluster of galaxies? Colliding. Clusters of galaxies are sometimes packed so tight that the galaxies that compose them collide . A prominent example…
Viewing discoveries from 15 December 2005 through 22 November 2005.