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.
Prominences and Filaments on the Active Sun
This colorized and digitally sharpened image of the Sun is composed of frames recording emission from hydrogen atoms in the solar chromosphere on May 15. Approaching the maximum…
RCW 85
From the 1960 astronomical catalog of Rodgers, Campbell and Whiteoak, emission region RCW 85 shines in southern night skies between bright stars Alpha and Beta Centauri. About…
Messier 66 Close Up
Big, beautiful spiral galaxy Messier 66 lies a mere 35 million light-years away. The gorgeous island universe is about 100 thousand light-years across, similar in size to the…
Aurora over Karkonosze Mountains
It was the first time ever. At least, the first time this photographer had ever seen aurora from his home mountains. And what a spectacular aurora it was. The Karkonosze Mountains…
Colorful Stars and Clouds near Rho Ophiuchi
Why is the sky near Antares and Rho Ophiuchi so colorful, yet dusty? The colors result from a mixture of objects and processes. Fine dust -- illuminated by starlight -- produces…
Sh2-132: The Lion Nebula
Is the Lion Nebula the real ruler of the constellation Cepheus ? This powerful feline appearing nebula is powered by two massive stars , each with a mass over 20 times greater…
How to Identify that Light in the Sky
What is that light in the sky? The answer to one of humanity's more common questions may emerge from a few quick observations. For example -- is it moving or blinking? If so, and…
Pandora's Cluster of Galaxies
This deep field mosaicked image presents a stunning view of galaxy cluster Abell 2744 recorded by the James Webb Space Telescope's NIRCam. Also dubbed Pandora's Cluster, Abell…
SH2-308: The Dolphin Head Nebula
Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 2-308 it lies some 5,000 light-years away toward the well-trained constellation…
NGC 4565: Galaxy on Edge
Magnificent spiral galaxy NGC 4565 is viewed edge-on from planet Earth. Also known as the Needle Galaxy for its narrow profile, bright NGC 4565 is a stop on many telescopic tours…
Shadow of a Martian Robot
What if you saw your shadow on Mars and it wasn't human? Then you might be the Perseverance rover exploring Mars . Perseverance has been examining the Red Planet since 2021,…
Comet Pons-Brooks Develops Opposing Tails
Why does Comet Pons-Brooks now have tails pointing in opposite directions? The most spectacular tail is the blue-glowing ion tail that is visible flowing down the image. The ion…
NGC 2403 in Camelopardalis
Magnificent island universe NGC 2403 stands within the boundaries of the long-necked constellation Camelopardalis. Some 10 million light-years distant and about 50,000 light-years…
Stereo Helene
Get out your red/blue glasses and float next to Helene, small, icy moon of Saturn. Appropriately named, Helene is a Trojan moon, so called because it orbits at a Lagrange point .…
The Nebulous Realm of WR 134
Made with narrowband filters, this cosmic snapshot covers a field of view over twice as wide as the full Moon within the boundaries of the constellation Cygnus. It highlights the…
A Lunar Corona over Paris
Why does a cloudy moon sometimes appear colorful? The effect , called a lunar corona , is created by the quantum mechanical diffraction of light around individual, similarly-sized…
Stairway to the Milky Way
What happens if you ascend this stairway to the Milky Way? Before answering that, let's understand the beautiful sky you will see. Most eye-catching is the grand arch of the Milky…
Chamaeleon I Molecular Cloud
Dark markings and bright nebulae in this telescopic southern sky view are telltale signs of young stars and active star formation . They lie a mere 650 light-years away, at the…
A Solar Filament Erupts
What's happened to our Sun? Nothing very unusual -- it just threw a filament . Toward the middle of 2012, a long standing solar filament suddenly erupted into space, producing an…
Manicouagan Impact Crater from Space
Orbiting 400 kilometers above Quebec, Canada, planet Earth, the International Space Station Expedition 59 crew captured this snapshot of the broad St. Lawrence River and curiously…
M78 from the Euclid Space Telescope
Star formation can be messy. To help find out just how messy, ESA 's new Sun-orbiting Euclid telescope recently captured the most detailed image ever of the bright star forming…
Unraveling NGC 3169
Spiral galaxy NGC 3169 looks to be unraveling like a ball of cosmic yarn. It lies some 70 million light-years away, south of bright star Regulus toward the faint constellation…
Green Aurora over Sweden
It was bright and green and stretched across the sky. This striking aurora display was captured in 2016 just outside of Östersund , Sweden . Six photographic fields were merged to…
CG4: The Globule and the Galaxy
Can a gas cloud eat a galaxy? It's not even close. The “claw” of this odd looking “creature” in the featured photo is a gas cloud known as a cometary globule . This globule,…
Viewing discoveries from 15 June 2024 through 21 May 2024.