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.
Flying Over the Earth at Night II
Recorded during 2017, timelapse sequences from the International Space Station are compiled in this serene video of planet Earth at Night. Fans of low Earth orbit can start by…
Planet Earth at Twilight
No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth . Instead, the shadow line or terminator is…
Centaurus A's Warped Magnetic Fields
When galaxies collide -- what happens to their magnetic fields ? To help find out, NASA pointed SOFIA , its flying 747, at galactic neighbor Centaurus A to observe the emission of…
Ingenuity: First Flight over Mars
What's the best way to explore Mars? Perhaps there is no single best way, but a newly demonstrated method shows tremendous promise: flight. Powered flight has the promise to…
The Galactic Center in Infrared
What does the center of our galaxy look like? In visible light, the Milky Way's center is hidden by clouds of obscuring dust and gas. But in this stunning vista , the Spitzer…
Rainbow Airglow over the Azores
Why would the sky glow like a giant repeating rainbow? Airglow . Now air glows all of the time, but it is usually hard to see. A disturbance however -- like an approaching storm…
Inside the Flame Nebula
The Flame Nebula is a stand out in optical images of the dusty, crowded star forming regions toward Orion's belt and the easternmost belt star Alnitak, a mere 1,400 light-years…
The Doubly Warped World of Binary Black Holes
Light rays from accretion disks around a pair of orbiting supermassive black holes make their way through the warped space-time produced by extreme gravity in this stunning…
The Galaxy, the Jet, and a Famous Black Hole
Bright elliptical galaxy Messier 87 (M87) is home to the supermassive black hole captured by planet Earth's Event Horizon Telescope in the first ever image of a black hole. Giant…
The Pencil Nebula Supernova Shock Wave
This supernova shock wave plows through interstellar space at over 500,000 kilometers per hour. Near the middle and moving up in this sharply detailed color composite , thin,…
Confirmed Muon Wobble Remains Unexplained
How fast do elementary particles wobble? A surprising answer to this seemingly inconsequential question came out of Brookhaven National Laboratory in New York , USA in 2001, and…
Alnitak and the Flame Nebula
What lights up the Flame Nebula? Fifteen hundred light years away towards the constellation of Orion lies a nebula which, from its glow and dark dust lanes, appears, on the left,…
When Black Holes Collide
What happens when two black holes collide? This extreme scenario occurs in the centers of many merging galaxies and multiple star systems. The featured video shows a computer…
Zodiacal Night
An intense band of zodiacal light is captured in this serene mountain and night skyscape from April 7. The panoramic view was recorded after three hours of hiking from a vantage…
Messier 106
Close to the Great Bear (Ursa Major) and surrounded by the stars of the Hunting Dogs (Canes Venatici), this celestial wonder was discovered in 1781 by the metric French astronomer…
3D Ingenuity
The multicolor, stereo imaging Mastcam-Z on the Perseverance rover zoomed in to captured this 3D close-up (get out your red/blue glasses) of the Mars Ingenuity helicopter on…
Threads of NGC 1947
Found in far southern skies, deep within the boundaries of the constellation Dorado , NGC 1947 is some 40 million light-years away. In silhouette against starlight, obscuring…
Mars and the Pleiades Beyond Vinegar Hill
Is this just a lonely tree on an empty hill? To start, perhaps, but look beyond . There, a busy universe may wait to be discovered. First, physically, to the left of the tree, is…
Veil Nebula: Wisps of an Exploded Star
Wisps like this are all that remain visible of a Milky Way star. About 7,000 years ago that star exploded in a supernova leaving the Veil Nebula . At the time, the expanding cloud…
In, Through, and Beyond Saturn's Rings
Four moons are visible on the featured image -- can you find them all? First -- and farthest in the background -- is Titan , the largest moon of Saturn and one of the larger moons…
Ingenuity on Sol 39
The Mars Ingenuity Helicopter , all four landing legs down, was captured here on sol 39 (March 30) slung beneath the belly of the Perseverance rover. The near ground level view is…
NGC 3521: Galaxy in a Bubble
Gorgeous spiral galaxy NGC 3521 is a mere 35 million light-years away, toward the constellation Leo . Relatively bright in planet Earth's sky, NGC 3521 is easily visible in small…
Rocket Launch as Seen from the Space Station
Have you ever seen a rocket launch -- from space? A close inspection of the featured time-lapse video will reveal a rocket rising to Earth orbit as seen from the International…
M87's Central Black Hole in Polarized Light
To play on Carl Sagan 's famous words “If you wish to make black hole jets, you must first create magnetic fields.” The featured image represents the detected intrinsic spin…
Viewing discoveries from 23 April 2021 through 31 March 2021.