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.
Moon Occults Saturn
Sometimes Saturn disappears. It doesn't really go away, though, it just disappears from view when our Moon moves in front . Such a Saturnian eclipse was visible along a small…
AZURE Vapor Tracers over Norway
What's happening in the sky? The atmosphere over northern Norway appeared quite strange for about 30 minutes last Friday when colorful clouds, dots, and plumes suddenly appeared.…
A Scorpius Sky Spectacular
If Scorpius looked this good to the unaided eye, humans might remember it better. Scorpius more typically appears as a few bright stars in a well-known but rarely pointed out…
ISS from Wallasey
After sunset on March 28 , the International Space Station climbed above the western horizon, as seen from Wallasey, England at the mouth of the River Mersey. Still glinting in…
Pan-STARRS Across the Sky
This astronomical sky spanning view is a mosaic from the Pan-STARRS observatory. The images were recorded with its 1.8 meter telescope at the summit of Haleakala on planet Earth's…
Messier 2
After the Crab Nebula , M1, this giant star cluster is the second entry in 18th century astronomer Charles Messier's famous list of things that are not comets. M2 is one of the…
Wisps Surrounding the Horsehead Nebula
The famous Horsehead Nebula in Orion is not alone. A deep exposure shows that the dark familiar shaped indentation, visible just below center, is part of a vast complex of…
Space Station Silhouette on the Moon
What's that unusual spot on the Moon? It's the International Space Station . Using precise timing, the Earth-orbiting space platform was photographed in front of a partially lit…
Astronaut Kicks Lunar Field Goal
Score three points for NASA. With time running out late in Apollo 15 's mission to the Moon in 1971, Astronaut David Scott prepared to split the uprights and bring about yet…
Markarian's Chain of Galaxies
Across the heart of the Virgo Cluster of Galaxies lies a striking string of galaxies known as Markarian's Chain . The chain, pictured here , is highlighted on the right with two…
3D 67P
Put on your red/cyan glasses and float next to the jagged and double-lobed nucleus of Churyumov-Gerasimenko, also known as Comet 67P . The stereo anaglyph was created by combining…
M104: The Sombrero Galaxy
The striking spiral galaxy M104 is famous for its nearly edge-on profile featuring a broad ring of obscuring dust lanes. Seen in silhouette against an extensive central bulge of…
The Gaia Stars of M15
Messier 15 is a 13 billion year old relic of the early formative years of our galaxy, one of about 170 globular star clusters that still roam the halo of the Milky Way. About 200…
NGC 1333: Stellar Nursery in Perseus
NGC 1333 is seen in visible light as a reflection nebula , dominated by bluish hues characteristic of starlight reflected by interstellar dust. A mere 1,000 light-years distant…
AE Aurigae and the Flaming Star Nebula
Is star AE Aurigae on fire? No. Even though AE Aurigae is named the flaming star, the surrounding nebula IC 405 is named the Flaming Star Nebula , and the region shape gives the…
Arp 194: Merging Galaxy Group
Why are stars forming in the bridge between these colliding galaxies? Usually when galaxies crash , star formation is confined to galaxy disks or tidal tail s. In Arp 194 ,…
Zooming in on Star Cluster Terzan 5
Globular clusters once ruled the Milky Way. Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. Today, there are…
Four Towers and the Equinox Moon
The first Full Moon of northern spring rises behind four distant towers in this telescopic view . In an image captured from some 40 kilometers west of the city of Madrid, this…
A Symphony in Northern Winter Skies
Despite the cold, a chance to view the shimmering northern lights coaxed this skygazer onto the frozen surface of Lake Superior on the west coast of the Keweenaw Peninsula and…
Star Trails and the Equinox Sunrise
Stars trail and the Sun rises in this night and day composite panorama made on March 19. The view looks toward the eastern horizon from La Nava de Santiago, Spain. To create it, a…
Equinox on Planet Earth
Welcome to an equinox on planet Earth. Today is the first day of spring in our fair planet's northern hemisphere, fall in the southern hemisphere, with day and night nearly equal…
Abell 370: Galaxy Cluster Gravitational Lens
What are those strange arcs? While imaging the cluster of galaxies Abell 370, astronomers noticed an unusual arc. The arc wasn't understood right away -- not until better images…
Horsehead and Orion Nebulas
The dark Horsehead Nebula and the glowing Orion Nebula are contrasting cosmic vistas. Adrift 1,500 light-years away in one of the night sky's most recognizable constellations ,…
M106: A Spiral Galaxy with a Strange Center
What's happening at the center of spiral galaxy M106? A swirling disk of stars and gas, M106 's appearance is dominated by blue spiral arms and red dust lanes near the nucleus, as…
Viewing discoveries from 9 April 2019 through 17 March 2019.