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.
The Rippled Red Ribbons of SNR 0509
What is causing the picturesque ripples of supernova remnant SNR 0509-67.5? The ripples, as well as the greater nebula, were imaged in unprecedented detail by the Hubble Space…
Phobos' South Pole from Mars Express
Where on this moon would you land? The moon pictured above is not Earth's moon but Phobos , the closest moon to the planet Mars. Phobos is so close to Mars that it is expected to…
Peekskill Fireball Video: Johnstown
The Peekskill meteor of 1992 was captured on 16 independent videos and then struck a car. Documented as brighter than the full Moon, the spectacular fireball crossed parts of…
Polar Ring Galaxy NGC 660
NGC 660 lies near the center of this intriguing skyscape , swimming in the boundaries of the constellation Pisces . Over 20 million light-years away, its peculiar appearance marks…
Alnitak, Alnilam, Mintaka
Alnitak , Alnilam , and Mintaka , are the bright bluish stars from east to west (left to right) along the diagonal in this gorgeous cosmic vista. Otherwise known as the Belt of…
The Once and Future Stars of Andromeda
The big, beautiful Andromeda Galaxy , aka M31, is a spiral galaxy a mere 2.5 million light-years away. Two space-based observatories have combined to produce this intriguing…
Saturn Storm
Late last year, a new, remarkably bright storm erupted in Saturn's northern hemisphere. Amateur astronomers first spotted it in early December, with the ringed gas giant rising in…
Kona Galaxy Garden
How does your galaxy grow? Quite contrary to a typical galaxy, this one needs water to flourish. Pictured above as it appears at the Paleaku Peace Gardens Sanctuary in Kona ,…
Night and Day above Almost Planet Sounio
Has a new planet been discovered? What is pictured above is a remarkable 24 hour mosaic surrounding a spot on Sounio , Greece , right here on planet Earth . Images taken at night…
Globular Star Cluster 47 Tuc
Globular star cluster 47 Tucanae is a jewel of the southern sky. Also known as NGC 104 , it roams the halo of our Milky Way Galaxy along with some 200 other globular star clusters…
A Total Eclipse at the End of the World
Would you go to the end of the world to see a total eclipse of the Sun? If you did, would you be surprised to find someone else there already? In 2003, the Sun, the Moon,…
Quadrantids over Qumis
The Quadrantid Meteor Shower is an annual event for planet Earth's northern hemisphere skygazers. It usually peaks briefly in the cold, early morning hours of January 4. The…
NGC 3521 Close Up
Gorgeous spiral galaxy NGC 3521 is a mere 35 million light-years distant, toward the constellation Leo . Spanning some 50,000 light-years, its central region is shown in this…
The Seagull Nebula
This broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth , suggesting its popular moniker - The Seagull Nebula . This portrait of…
The Cosmic Web of the Tarantula Nebula
It is the largest and most complex star forming region in the entire galactic neighborhood. Located in the Large Magellanic Cloud , a small satellite galaxy orbiting our Milky Way…
A Sun Halo Beyond Stockholm
What's happened to the Sun? Sometimes it looks like the Sun is being viewed through a large lens . In the above case, however, there are actually millions of lenses: ice crystals…
The Antikythera Mechanism
What is it? It was found at the bottom of the sea aboard an ancient Greek ship. Its seeming complexity has prompted decades of study, although some of its functions remained…
NGC 7293: The Helix Nebula
A mere seven hundred light years from Earth, in the constellation Aquarius , a sun-like star is dying. Its last few thousand years have produced the Helix Nebula (NGC 7293), a…
Sunset, Moonset
Seen from central and northern Asia, the Sun and New Moon set together on January 4, in a partial solar eclipse . Close to its maximum phase, the eclipse is captured near the…
Sunrise, Moonrise
For many Europeans, the Sun and New Moon rose together on January 4 in a partial solar eclipse . Arriving close on the heels of the new year, it was the first of a series of…
Eclipsing the Sun
Skywatchers throughout much of Europe, North Africa, and Central Asia, were treated to the first eclipse of the new year on January 4, a partial eclipse of the Sun . But traveling…
A Green Flash from the Sun
Many think it is just a myth . Others think it is true but its cause isn't known. Adventurers pride themselves on having seen it. It's a green flash from the Sun . The truth is…
Winter Hexagon Over Stagecoach Colorado
If you can find Orion, you might be able to find the Winter Hexagon. The Winter Hexagon involves some of the brightest stars visible, together forming a large and easily found…
Looking Back at an Eclipsed Earth
Here is what the Earth looks like during a solar eclipse . The shadow of the Moon can be seen darkening part of Earth . This shadow moved across the Earth at nearly 2000…
Viewing discoveries from 25 January 2011 through 2 January 2011.