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.
When the Moon Was Young
Remember when the Moon was young? It was just last Monday. On May 9th, this slender crescent Moon was recorded at a tender age of 34 hours and 18 minutes. Well, OK ... when…
Stars, Galaxies, and Comet Tempel 1
Faint comet Tempel 1 sports a fuzzy blue-tinted tail, just right of center in this lovely field of stars . Recorded on May 3rd slowly sweeping through the constellation Virgo,…
The Sombrero Galaxy in Infrared
This floating ring is the size of a galaxy. In fact, it is part of the photogenic Sombrero Galaxy , one of the largest galaxies in the nearby Virgo Cluster of Galaxies . The dark…
The First Image of an Extra Solar Planet
It's the faint red object, not the bright white one that might be a historic find. The white object is surely a brown dwarf star . Quite possibly, however, the red object is the…
Stars, Dust and Nebula in NGC 6559
When stars form, pandemonium reigns. A textbook case is the star forming region NGC 6559 . Visible above are red glowing emission nebulas of hydrogen , blue reflection nebulas of…
CMBR Dipole: Speeding Through the Universe
Our Earth is not at rest. The Earth moves around the Sun . The Sun orbits the center of the Milky Way Galaxy . The Milky Way Galaxy orbits in the Local Group of Galaxies . The…
NGC 3314: When Galaxies Overlap
NGC 3314 consists of two large spiral galaxies which just happen to almost exactly line-up. The foreground spiral is viewed nearly face-on , its pinwheel shape defined by young…
Hybrid Solar Eclipse
April's spectacular geocentric celestial event was a rare hybrid eclipse of the Sun - a total or an annular eclipse could be seen depending on the observer's location. For Fred…
Mira: The Wonderful Star
To seventeenth century astronomers, Omicron Ceti or Mira was known as a wonderful star - a star whose brightness could change dramatically in the course of about 11 months. Modern…
Cassini Spacecraft Crosses Saturn's Ring Plane
If this is Saturn, where are the rings? When Saturn's “appendages” disappeared in 1612, Galileo did not understand why. Later that century, it became understood that Saturn 's…
Solar System Rising Over Fire Island
If you wait long enough, the entire Solar System will rise before you. To see such a sight, however, you will need to look in the direction of the ecliptic . All of the planets…
Methusaleh Outcrop on Mars
What is the history of the outcropping of rock called Methuselah? The unusual rock group is visible on the left of the above image taken by the robot Spirit rover current…
Planetary Nebula Mz3: The Ant Nebula
Why isn't this ant a big sphere? Planetary nebula Mz3 is being cast off by a star similar to our Sun that is, surely, round. Why then would the gas that is streaming away create…
The Moons of Earth
While orbiting the planet during their June 1998 mission, the crew of the Space Shuttle Discovery photographed this view of two moons of Earth. Thick storm clouds are visible in…
Small Moon Epimetheus
Small saturnian moon Epimetheus ( ep-ee-MEE-thee-us ) is at most 116 kilometers across. Its cratered surface and irregular shape are highlighted by dramatic shadows in this…
M51: Cosmic Whirlpool
Follow the handle of the Big Dipper away from the dipper's bowl, until you get to the handle's last bright star. Then, just slide your telescope a little south and west and you…
The Hercules Cluster of Galaxies
These are galaxies of the Hercules Cluster , an archipelago of “island universes” a mere 650 million light-years distant. This cluster is loaded with gas and dust rich, star…
A Martian Dust Devil Passes
What goes there across the plains of Mars? A dust devil . For the first time, definitive movies of the famous spinning dust towers have been created from ground level . The robot…
The Fairy of Eagle Nebula
The dust sculptures of the Eagle Nebula are evaporating. As powerful starlight whittles away these cool cosmic mountains , the statuesque pillars that remain might be imagined as…
M16: Stars from Eagle's EGGs
Newborn stars are forming in the Eagle Nebula. This image , taken with the Hubble Space Telescope in 1995, shows evaporating gaseous globules (EGGs) emerging from pillars of…
Eclipsed Moon in Infrared
In September of 1996, the Midcourse Space Experiment (MSX) satellite had a spectacular view of a total lunar eclipse from Earth orbit . SPIRIT III, an on board infrared telescope,…
Albert Einstein's Miraculous Year
In 1905 Albert Einstein had a miraculous year . One hundred years ago, he wrote four papers which revolutionized our understanding of the Universe. The papers outlined; the idea…
G21.5-0.9: A Supernova's Cosmic Shell
The picture is lovely, but this pretty cosmic shell was produced by almost unbelievable violence - created when a star with nearly 20 times the mass of the sun blasted away its…
Barnard's Loop Around Orion
Why is the belt of Orion surrounded by a bubble? Although glowing like an emission nebula , the origin of the bubble, known as Barnard's Loop , is currently unknown. Progenitor…
Viewing discoveries from 13 May 2005 through 20 April 2005.