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Multiwavelength M81
Title Multiwavelength M81
Description This beautiful galaxy is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. The galaxy is similar to our Milky Way, but our favorable view provides a better picture of the typical architecture of spiral galaxies. M81 may be undergoing a surge of star formation along the spiral arms due to a close encounter it may have had with its nearby spiral galaxy NGC 3077 and a nearby starburst galaxy (M82) about 300 million years ago. M81 is one of the brightest galaxies that can be seen from the Earth. It is high in the northern sky in the circumpolar constellation Ursa Major, the Great Bear. At an apparent magnitude of 6.8 it is just at the limit of naked-eye visibility. The galaxy's angular size is about the same as that of the Full Moon. This image combines data from the Hubble Space Telescope, the Spitzer Space Telescope, and the Galaxy Evolution Explorer (GALEX) missions. The GALEX ultraviolet data were from the far-UV portion of the spectrum (135 to 175 nanometers). The Spitzer infrared data were taken with the IRAC 4 detector (8 microns). The Hubble data were taken at the blue portion of the spectrum.
Hubble Photographs Grand Des …
Title Hubble Photographs Grand Design Spiral Galaxy M81
General Information What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. The sharpest image ever taken of the large "grand design" spiral galaxy M81 is being released today at the American Astronomical Society Meeting in Honolulu, Hawaii. A spiral-shaped system of stars, dust, and gas clouds, the galaxy's arms wind all the way down into the nucleus. Though the galaxy is located 11.6 million light-years away, the Hubble Space Telescope's view is so sharp that it can resolve individual stars, along with open star clusters, globular star clusters, and even glowing regions of fluorescent gas. The Hubble data was taken with the Advanced Camera for Surveys in 2004 through 2006. This color composite was assembled from images taken in blue, visible, and infrared light.
M81 Galaxy is Pretty in Pink
PIA09579
GALEX Telescope, Infrared Ar …
Title M81 Galaxy is Pretty in Pink
Original Caption Released with Image The perfectly picturesque spiral galaxy known as Messier 81, or M81, looks sharp in this new composite from NASA's Spitzer and Hubble space telescopes and NASA's Galaxy Evolution Explorer. M81 is a "grand design" spiral galaxy, which means its elegant arms curl all the way down into its center. It is located about 12 million light-years away in the Ursa Major constellation and is one of the brightest galaxies that can be seen from Earth through telescopes. The colors in this picture represent a trio of light wavelengths: blue is ultraviolet light captured by the Galaxy Evolution Explorer, yellowish white is visible light seen by Hubble, and red is infrared light detected by Spitzer. The blue areas show the hottest, youngest stars, while the reddish-pink denotes lanes of dust that line the spiral arms. The orange center is made up of older stars.
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble Spies Shells of Spark …
Title Hubble Spies Shells of Sparkling Stars Around Quasar
Hubble Sees 'Comet Galaxy' B …
Title Hubble Sees 'Comet Galaxy' Being Ripped Apart By Galaxy Cluster
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Hubble and Spitzer Space Tel …
Title Hubble and Spitzer Space Telescopes Find "Lego-Block" Galaxies in Early Universe
Hubble Approaches the Final …
Title Hubble Approaches the Final Frontier: The Dawn of Galaxies
Hubble Approaches the Final …
Title Hubble Approaches the Final Frontier: The Dawn of Galaxies
Hubble Approaches the Final …
Title Hubble Approaches the Final Frontier: The Dawn of Galaxies
Hubble Spies Shells of Spark …
Title Hubble Spies Shells of Sparkling Stars Around Quasar
Hubble Spies Shells of Spark …
Title Hubble Spies Shells of Sparkling Stars Around Quasar
Hubble Spies Shells of Spark …
Title Hubble Spies Shells of Sparkling Stars Around Quasar
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Astronomers Find One of the …
Title Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe
Hubble Maps the Cosmic Web o …
Title Hubble Maps the Cosmic Web of "Clumpy" Dark Matter in 3-D
General Information What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. An international team of astronomers using NASA's Hubble Space Telescope has created a three-dimensional map that provides the first direct look at the large-scale distribution of dark matter in the universe. Read more: * NASA Press Release [ http://hubblesite.org/newscenter/archive/releases/2007/01/text/ ] * The Full Story [ http://hubblesite.org/newscenter/archive/releases/2007/01/full/ ]
Hubble Approaches the Final …
Title Hubble Approaches the Final Frontier: The Dawn of Galaxies
Galaxy Mission Completes Fou …
PIA09337
GALEX Telescope
Title Galaxy Mission Completes Four Star-Studded Years in Space
Original Caption Released with Image NASA's Galaxy Evolution Explorer is celebrating its fourth year in space with some of M81's "hottest" stars. In a new ultraviolet image, the magnificent M81 spiral galaxy is shown at the center. The orbiting observatory spies the galaxy's "sizzling young starlets" as wisps of bluish-white swirling around a central golden glow. The tints of gold at M81's center come from a "senior citizen" population of smoldering stars. "This is a spectacular view of M81," says Dr. John Huchra, of the Harvard Smithsonian Center for Astrophysics, Cambridge, Mass. "When we proposed to observe this galaxy with GALEX we hoped to see globular clusters, open clusters, and young stars...this view is everything that we were hoping for." The image is one of thousands gathered so far by GALEX, which launched April 28, 2003. This mission uses ultraviolet wavelengths to measure the history of star formation 80 percent of the way back to the Big Bang. The large fluffy bluish-white material to the left of M81 is a neighboring galaxy called Holmberg IX. This galaxy is practically invisible to the naked human eye. However, it is illuminated brilliantly in GALEX's wide ultraviolet eyes. Its ultraviolet colors show that it is actively forming young stars. The bluish-white fuzz in the space surrounding M81 and Holmberg IX is new star formation triggered by gravitational interactions between the two galaxies. Huchra notes that the active star formation in Holmberg IX is a surprise, and says that more research needs to be done in light of the new findings from GALEX. "Some astronomers suspect that the galaxy Holmberg IX is the result of a galactic interaction between M81 and another neighboring galaxy M82," says Huchra. "This particular galaxy is especially important because there are a lot of galaxies like Holmberg IX around our Milky Way galaxy. By understanding how Holmberg IX came to be, we hope to understand how all the little galaxies surrounding the Milky Way developed.""Four years after GALEX's launch, the spacecraft is performing magnificently. The mission results have been simply amazing as it helps us to unlock the secrets of galaxies, the building blocks of our universe," says Kerry Erickson, GALEX project manager. M81 and Holberg IX are located approximately 12 million light-years away in the northern constellation Ursa Major. In addition to leading the GALEX observations of M81, Huchra and his team also took observations of the region with NASA's Spitzer and Hubble space telescopes. By combining all these views of M81, Huchra hopes to gain a better understanding about how M81 has developed into the spiral galaxy we see today. The California Institute of Technology in Pasadena, Calif., leads the Galaxy Evolution Explorer mission and is responsible for science operations and data analysis. NASA's Jet Propulsion Laboratory, also in Pasadena, manages the mission and built the science instrument. The mission was developed under NASA's Explorers Program, managed by the Goddard Space Flight Center, Greenbelt, Md. Researchers from South Korea and France collaborated on this mission.
Hubble Approaches the Final …
Title Hubble Approaches the Final Frontier: The Dawn of Galaxies
Hubble Pinpoints Doomed Star …
Title Hubble Pinpoints Doomed Star that Explodes as Supernova
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