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.
An Unusual Hole in Mars
What created this unusual hole in Mars? Actually, there are numerous holes pictured in this Swiss cheese-like landscape , with all-but-one of them showing a dusty, dark, Martian…
IC 418: The Spirograph Nebula
What is creating the strange texture of IC 418? Dubbed the Spirograph Nebula for its resemblance to drawings from a cyclical drawing tool , planetary nebula IC 418 shows patterns…
Saturn in the Milky Way
Saturn is near opposition in planet Earth's sky. Rising at sunset and shining brightly throughout the night, it also lies near a line-of-sight to crowded starfields, nebulae, and…
M27: Not a Comet
While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets.…
Firefall by Moonlight
On certain dates in February, an elusive firefall can be spotted at sunset in Yosemite National Park , when the weather cooperates and the direction to the setting Sun is just…
The Case of the Missing Star
What's happened to giant star N6946-BH1? It was there just a few years ago -- Hubble imaged it . Now there's only a faint glow. What's curiouser , no bright supernova occurred --…
Highlights of the Summer Sky
What's up in the sky this summer? The featured graphic gives a few highlights for Earth's northern hemisphere. Viewed as a clock face centered at the bottom, early summer sky…
Orion: Belt, Flame, and Horsehead
What surrounds the famous belt stars of Orion? A deep exposure shows everything from dark nebula to star clusters, all embedded in an extended patch of gaseous wisps in the…
Perijove Passage
On May 19, the Juno spacecraft once again swung by Jupiter in its looping 53 day orbit around the Solar System's ruling gas gaint. Beginning at the top, this vertical 14 frame…
Black Holes of Known Mass
Add GW170104 to the chart of black holes with known mass. The extremely energetic merger of two smaller black holes corresponds to the Laser Interferometer Gravitational-wave…
Shadowrise and Sunset
The road tracking through this stunning 360 degree view crosses a remote mountain area of Jämtland, Sweden, planet Earth . A 3x8 mosaic of still images, the panorama was taken on…
A Kalahari Sky
You wake up in the Kalahari Desert in Botswana , Africa . You go outside your tent, set up your camera, and take long exposure s of the land and sky. What might you see? Besides a…
Beneath Jupiter
Jupiter is stranger than we knew. NASA's Juno spacecraft has now completed its sixth swoop past Jupiter as it moves around its highly elliptical orbit. Pictured , Jupiter is seen…
Collapse in Hebes Chasma on Mars
What's happened in Hebes Chasma on Mars? Hebes Chasma is a depression just north of the enormous Valles Marineris canyon. Since the depression is unconnected to other surface…
Comet Clark is near the Edge
Sweeping through this stunning field of view, Comet 71P/Clark really is in the foreground of these cosmic clouds. The 2 panel telescopic mosaic is color enhanced and is about 5…
Spiral Galaxy NGC 6744
Big, beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way . It lies some 30 million light-years distant in the southern…
Star Cluster, Spiral Galaxy, Supernova
A cosmic snapshot from May 19, this colorful telescopic field of view spans about 1 degree or 2 full moons on the sky. Spiky in appearance, foreground Milky Way stars are…
NGC 4565: Galaxy on Edge
Is our Galaxy this thin? We believe so. Magnificent spiral galaxy NGC 4565 is viewed edge-on from planet Earth. Also known as the Needle Galaxy for its narrow profile, bright NGC…
A Zodiacal Sky over Horseshoe Bend
What's causing the unusual ray of white light extending upward from the central horizon? Dust orbiting the Sun. At certain times of the year, a band of sun-reflecting dust from…
In the Center of the Lagoon Nebula
The center of the Lagoon Nebula is a whirlwind of spectacular star formation. Visible on the lower left, at least two long funnel-shaped clouds, each roughly half a light-year…
A View Toward M101
Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least . About 170,000 light-years across, this…
Wolf-Lundmark-Melotte
Named for the three astronomers instrumental in its discovery and identification, Wolf - Lundmark - Melotte (WLM) is a lonely dwarf galaxy. Seen toward the mostly southern…
Simeis 147: Supernova Remnant
It's easy to get lost following intricate filaments in this detailed image of faint supernova remnant Simeis 147. Also cataloged as Sharpless 2-240 it goes by the popular…
Galaxy Group Hickson 90
Scanning the skies for galaxies, Canadian astronomer Paul Hickson and colleagues identified some 100 compact groups of galaxies , now appropriately called Hickson Compact Groups…
Viewing discoveries from 12 June 2017 through 17 May 2017.