Skip Navigation
menu close modal
Resources

OAO (Orbiting Astronomical Observatory)

This illustration shows one of NASA's OAO spacecraft in shades of blue. The body of the satellite is an octagon. The telescope opening is embedded at the top of the octagon, which also has a flap that is open. Two-layered solar panels are attached on both sides. Antennae extend from the top and bottom.
Credit: NASA
Published: January 9, 2023

An illustration of one of NASA's OAO spacecraft. The colors depicted in this illustration are for artistic purposes only.

ENLARGE

Explore the Universe

Related

An illustration of a blue spiral galaxy.
More
A hazy range of blues with darker blue around the edge makes up the base of this swirling spiral of white lines twirling inward toward a white cloud with a white spot in the center. White dots representing stars speckle the image.
Spiral Galaxy (Blue)
An illustration of a planetary nebula.
More
A subtly transparent, colorful hourglass shape has a central point that is a white circle surrounded by bright, white haze. Extending outward from the center in opposite directions are plums of color that form the hourglass shape. The central part of each plume starts as an icy, light blue and fades upward into a purple color and outward into red. White dots representing stars speckle the image.
Planetary Nebula (Version Two, Purple)
An illustration of NASA's IXPE observatory.
More
The IXPE observatory is illustrated in shades of blue. The full shape of IXPE is horizontal, with a three-leaf-clover shaped base with small cylinders on each "leaf" of the base. Stemming outward is a long cylindrical body that comes to a larger, open head with a series of thin panels on top.
IXPE (Imaging X-ray Polarimetry Explorer)
An illustration showing the side of an irregular galaxy.
More
A very long, diffuse, vaguely oval-shaped blob has a hazy dark purple color around its edge and it gets progressively lighter moving inward toward a cloudy white center. White dots representing stars speckle the image.
Irregular Galaxy (Side View)
An illustration of a planetary nebula.
More
In the background is a hazy pink and purple circle, with dark, transparent dark purple around the edge and lighter/brighter pinks leading inward. In front of the big circle is a purple object, shaped like a minimal, twisty lemon. Inside of this shape is a central, light yellow, cloudy circle with a bright white spot in the middle. All within the lemon-shaped object, the white spot is surrounded by a pink oblong oval shape which is overlapped by two large, pink circular shapes and two small, pink circular shapes. White dots representing stars speckle the image.
Planetary Nebula (Version One, Pink)
An illustration showing a purple, front view of a barred spiral galaxy.
More
A background of medium, bright purple shows a bright, white, thin line that creates an oblong, elongated swirl that connects in the middle with a yellowish, diffuse cloud. White dots representing stars speckle the image.
Barred Spiral Galaxy (Front View, Purple)
An illustration of NASA’s Kepler Space Telescope.
More
This illustration shows NASA's Kepler mission in shades of blue. The main body of the spacecraft is cylindrical in shape, with a slanted top and a base that attaches to a structure wrapping around half of the main body of the craft.
Kepler Space Telescope
An illustration of JAXA's Hitomi spacecraft.
More
This Hitomi illustration shows the space telescope in shades of blue. The main body of the spacecraft is a long octagon with a cylindrical object on the front end. The cylinder has several smaller cylinders extending from it. On the back end of the satellite extends a long pole that ends in an octagonal panel. Solar panels extend to either side of the main body.
Hitomi
An illustration of ESA's XMM Newton observatory.
More
This illustration shows ESA's XMM-Newton observatory in shades of blue. Overall, the craft is dragonfly-shaped with a long, cylindrical body and an open "head" from which two solar array "wings" extend.
XMM Newton (X-ray Multi-Mirror Mission Newton)
 An illustration of ESA's Euclid spacecraft.
More
An illustration in multiple shades of blue depicting Euclid. The spacecraft has a cylindrical body with an open top and a flat, square base as well as a flat panel along its back.
Euclid
An illustration of NASA's COBE spacecraft.
More
COBE is illustrated in light and dark blues. With two wings made up of three rectangular solar arrays each, the spacecraft's main body is made up of a striped, multi-sided cylinder with an attached cone-shaped structure on top.
COBE (Cosmic Background Explorer)
An illustration of JAXA's Suzaku spacecraft.
More
This illustration shows the Suzaku spacecraft in shades of blue. The long body of the spacecraft is narrower at the top than at the bottom, which has a hollow area underneath. Solar panels extend to either side of the widest part of the body. Round circles representing the telescopes extend from the top of the narrowest part of the body.
Suzaku
An illustration showing a blue, side view of a barred spiral galaxy.
More
An illustration has an elongated oval in light blue stretching across the center, outlined in a darker blue. Behind the strip is a diffuse, very light blue cloud that fades into a light blue and then a darker blue. All over the image are white speckles, representing stars.
Barred Spiral Galaxy (Side View, Blue)
An illustration of an orange and yellow elliptical galaxy.
More
A diffuse oval is outlined by a light orange-ish yellow but gets progressively lighter in rings towards the center, a bright white spot surrounded by a small ring of white haze. White dots representing stars speckle the image.
Elliptical Galaxy (Orange/Yellow)
An illustration of NASA's SPHEREx spacecraft.
More
This illustration of NASA's SPHEREx mission shows the spacecraft in shades of blue. The main body of the spacecraft is cone shaped with smaller cone shapes within it, with a solar array "wing" stemming from the side of the craft.
SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer)
An illustration of the ASCA spacecraft, developed by the Institute of Space and Astronautical Science in Japan.
More
A graphic of ASCA is shown in light and dark shades of blue. The body of the spacecraft is bottle shaped, and an array of solar panels crosses on top of the widest part.
ASCA (Advanced Satellite for Cosmology and Astrophysics)
An illustration of NASA's GALEX spacecraft.
More
GALEX is illustrated in multiple shades of blue. The spacecraft body is made up of a hexagonal object topped by a cylindrical object. Solar panels extend to either side.
GALEX (Galaxy Evolution Explorer)
An illustration of JAXA’s XRISM spacecraft.
More
This illustration shows NASA's XRISM spacecraft in shades of blue. A multi-sided cylindrical body has solar array "wings" on either side and a smaller, rounded cylindrical front with small pieces of the instrument at the very front.
XRISM (X-ray Imaging and Spectroscopy Mission)
An illustration of ESA’s INTEGRAL spacecraft.
More
This INTEGRAL illustration shows the space telescope in shades of blue. The main body of the spacecraft is made of an octagonal base. A long rectangle extends from the base above a cylinder. Solar panels extend from either side of the base.
INTEGRAL (International Gamma-Ray Astrophysics Laboratory)
An illustration of NASA's Hubble spacecraft.
More
This Hubble illustration shows the space telescope in shades of blue. A main cylindrical body has an opening with a flap at the top. The spacecraft's main body connects to two sets of two panels jutting out from either side horizontally and two circular objects attached vertically.
Hubble Space Telescope
An illustration of an orange elliptical galaxy.
More
A diffuse oval is outlined by dark orange but gets progressively lighter in rings towards the center, a bright white spot surrounded by a small ring of white haze. White dots representing stars speckle the image.
Elliptical Galaxy (Orange)
An illustration of ESA's Planck spacecraft.
More
This illustration shows ESA's Planck spacecraft in shades of blue. The craft has a circular base topped by a short instrument with an open top and instrument pieces visible inside.
Planck
An illustration of a purple spiral galaxy.
More
A hazy range of purples makes up the base of this swirling spiral of light blue lines twirling inward toward a yellow cloud with a white spot in the center. White dots representing stars speckle the image.
Spiral Galaxy (Purple)
An illustration of NASA's Nancy Grace Roman Space Telescope.
More
This illustration shows NASA's Roman mission in shades of blue. A multi-sided cylindrical body has an opening at its top. Exending from the opening are panels along the top half. A flat panel on the back represents the solar panel. Along the side of the body a few instruments are visible.
Nancy Grace Roman Space Telescope
An illustration of NASA's SuperTIGER instrument.
More
This illustration shows NASA's SuperTIGER instrument in shades of blue. This balloon-borne instrument has a main, box-shaped body on top of a structure that has panels attached to the bottom and a piece of the structure that extends outward on one side of the box-shaped instrument body.
SuperTIGER (Super Trans-Iron Galactic Element Recorder)

Explore the Universe

Universe News

The galaxy JW100 features prominently in this image from the NASA/ESA Hubble Space Telescope.
More
Hubble Snaps a Galactic Jellyfish
Hubble Snaps a Galactic Jellyfish
Researchers observing with NASA’s James Webb Space Telescope have pinpointed silicate cloud features in a distant planet’s atmosphere.
More
NASA's Webb Spots Swirling, Gritty Clouds on Remote Planet
NASA's Webb Spots Swirling, Gritty Clouds on Remote Planet
UGCA 307 hangs against an irregular backdrop of distant galaxies in this image from the Hubble Space Telescope.
More
Hubble Sees a Diminutive Dwarf Galaxy
Hubble Sees a Diminutive Dwarf Galaxy
The Large Area Telescope aboard NASA’s Fermi satellite can give us a glimpse of an otherwise invisible cosmic light show.
More
NASA's Fermi Captures Dynamic Gamma-Ray Sky in New Animation
NASA's Fermi Captures Dynamic Gamma-Ray Sky in New Animation
The rare sight of a Wolf-Rayet star was one of the first observations made by NASA’s Webb in June 2022.
More
NASA's Webb Telescope Captures Rarely Seen Prelude to Supernova
NASA's Webb Telescope Captures Rarely Seen Prelude to Supernova
The irregular spiral galaxy NGC 5486 hangs against a background of dim, distant galaxies in this Hubble image.
More
Hubble Spots a Star-Forming Spiral
Hubble Spots a Star-Forming Spiral
Scientists created a gargantuan synthetic survey showing what we can expect from the Roman Space Telescope’s future observations.
More
Millions of Galaxies Emerge in New Simulated Images From NASA's Roman
Millions of Galaxies Emerge in New Simulated Images From NASA's Roman
This image features a galaxy called 3C 297 that is lonelier than expected after it likely pulled in and absorbed its former companion galaxies.
More
Chandra Helps Astronomers Discover a Surprisingly Lonely Galaxy
Chandra Helps Astronomers Discover a Surprisingly Lonely Galaxy
A “jellyfish galaxy” with trailing tentacles of stars hangs in inky blackness in this Hubble image.
More
Hubble Peers at a Galactic Seascape
Hubble Peers at a Galactic Seascape
NASA's Hubble captured photos of asteroid Dimorphos when it was deliberately hit by a spacecraft called DART in September 2022.
More
Hubble Captures Movie of DART Asteroid Impact Debris
Hubble Captures Movie of DART Asteroid Impact Debris
A new simulation shows how NASA’s Roman Space Telescope will unveil the evolving universe in ways that have never been possible before.
More
How NASA's Roman Space Telescope Will Rewind the Universe
How NASA's Roman Space Telescope Will Rewind the Universe
A massive galaxy cluster in the constellation Cetus dominates the center of this Hubble image.
More
Hubble Observes Cosmic Contortions
Hubble Observes Cosmic Contortions