M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

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... Weak Lensing Distorts the Universe . ... Spiral Galaxy NGC 2841 . ... Some 50 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. ... Across the Universe . ... Of course, if you know where to look you can also spot the Andromeda Galaxy as a pale, fuzzy cloud, around 2.5 million light-years away. The N44 Complex . ... A truly giant complex of emission nebulae, N44 is about 1,000 light-years across. ... The NGC 3576 Nebula . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Colin Johnston . ... Our Galaxy . ... To locate it, look along the imaginary line between the two end stars on the leading edge of the PloughтАЩs blade (Merak and Dubhe) and Polaris (the North Star), the galaxy M82 (also known as the Cigar Galaxy) along with its companion M81, lies just off this line about a third of the way between the Plough and Polaris. €а€аAs usual, the supernova is far brighter than its home galaxy, appearing as an extra star. ...

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• Supernova spotted by Irish astronomer | Astronotes
• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• Six glorious spiral galaxies seen by the European Southern Observatory. |

... 2008 January 24 . Andromeda Island Universe . ... Explanation: The most distant object easily visible to the unaided eye is M31 , the great Andromeda Galaxy some two and a half million light-years away. ... Were these "spiral nebulae" simply outlying components of our own Milky Way Galaxy or were they instead "island universes" -- distant systems of stars comparable to the Milky Way itself? ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

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• APOD: 2000 September 8 - Andromeda Island Universe
• APOD: 2010 January 9 - Andromeda Island Universe
• APOD: 2002 May 18 - Andromeda Island Universe

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

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... The search for distant objects which can be both galaxies and quasars is one of the most important problems of observational astrphysics, because it allows one to determine cosmological parameters connected with the time of appearence and evolution of stellar systems, large scale structure of the Universe. ... Radio galaxies are important objects to be studied because they are sources of infrared-optical-ultraviolet continuum, emission lines and continual radio emission. ...

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... STScI-PRC99-28 GALAXY COLLISIONS IN DISTANT CLUSTER The group of galaxies -- or "galaxy cluster" -- catalogued as MS1054-03 is 8 billion light-years away, one of the most distant known so far. Although hundreds of galaxies appear in the NASA/ESA Hubble Space Telescope image, a European-led team of astronomers has studied in detail 81 galaxies that certainly belong to the cluster, 13 of which are remnants of recent collisions or pairs of colliding galaxies. ...

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• http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/Galassie/Seyfert2.txt
• APOD: July 15, 1998 - Ghost Galaxy NGC 2915
• STScI- PRC99-10: Hubble's Infrared Galaxy Gallery

Gerhardt Meurer (Johns Hopkins University) . The accompanying picture shows NGC 2915, which Australian, Canadian, and American astronomers have shown to be the darkest known disk galaxy. ... The team of astronomers, lead by Gerhardt Meurer at Johns Hopkins University, analyzed the rotation of the galaxy and showed that NGC 2915 is composed mostly of "dark matter". Dark matter is extremely difficult to detect since it does not emit any radiation. ... Gerhardt R. Meurer . ...

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• Press Release 9 June 1998 Press Release
• ATNF Daily Astronomy Picture
• Ghost Galaxy NGC2915

EMBARGOED UNTIL: 9:20 AM CST, January 6, 1999 CONTACT: John Biretta Space Telecsope Science Institute, Baltimore, MD (Phone: (410) 338-4917; Internet: biretta@stsci.edu) HUBBLE DETECTS FASTER-THAN-LIGHT MOTION IN GALAXY M87 Astronomers reported today discovering clouds which appear to move many times faster than the speed of light, shooting out from the region of a black hole at the center of the M87 galaxy. ... It's an illusion created by the finite speed of light and rapid motion," Biretta said. ...

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• Dust disk around a black hole in galaxy NGC 7052
• MSNBC, 23 March 1998
• Starburst and Galaxy evolution

... Astronomy news . ... NASA's Spitzer Images Out-of-This-World Galaxy . ... It is spiral-shaped like our Milky Way, with long, spindly arms of stars. The "eye" at the center of the galaxy is actually a monstrous black hole surrounded by a ring of stars. In this color-coded infrared view from Spitzer, the area around the invisible black hole is blue and the ring of stars, white. ... The ring around the black hole is bursting with new star formation. ...

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An image of the grand design of spiral galaxy M100 obtained with NASA's Hubble Space Telescope resolves individual stars within the majestic spiral arms. ... Hubble has the ability to resolve individual stars in other galaxies and measure accurately the light from very faint stars. This makes space telescope invaluable for identifying a rare class of pulsating stars, called Cepheid Variable stars embedded within M100's spiral arms. ... 617) 495-7062 . Fax: (617) 495-7356 . ...

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• PAUL J. GREEN - Page de la Maison
• The AstroStat Slog GRB
• The AstroStat Slog standard candle

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

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In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

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• ASP: Beacons in the Gloom
• ASP: An Ancient Universe - Galaxies
• ASP: An Ancient Universe - The Age of Light from the Most Distant Galaxies

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• Visible light view of a distant galaxy cluster discovered in the XXL survey
• Infrared/visible-light view of the distant dusty galaxy A1689-zD1 behind the
• The Invisible Galaxies That Could Not Hide | ESO

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

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• The Celestial Sphere--lesson plan #1a

Astronomers at Armagh Observatory and Cardiff University have independently discovered new mechanisms by which micro-organisms may have spread throughout the Galaxy. Scientific papers on the topic by Professor Bill Napier at Armagh, and by Dr Max Wallis and Professor Chandra Wickramasinghe at Cardiff University, will appear simultaneously in the Monthly Notices of the Royal Astronomical Society . ... Cardiff scientists Max Wallis and Chandra Wickramasinghe have identified another delivery route. ...

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• Armagh Observatory
• The Cosmology of Distant and Dusty Galaxies: 3 Nov, Belfast | International
• M.D. Smith, Research Astronomer

... NOTE TO EDITORS: GALAXY FLY-THROUGH AVAILABLE ONLINE . HUGE GALAXY STRING CHALLENGES SPACE THEORY . An enormous string of galaxies 300 million light-years long has been discovered in the remote Universe, challenging existing theories about how the Universe evolved. ... ANU astronomer Dr Paul Francis, who coordinated the international research team, said the galaxy string lay 10,800 million light-years away. ... The research was funded by NASA and the Australian National University. ...

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• VV29 = Arp 188 = The Chainsaw Galaxy
• Julie Banfield | Astronomer
• Giant Galaxy String Defies Models of How Universe Evolved

This long-exposure Hubble Space Telescope image of massive galaxy cluster Abell 2744 is the deepest ever made of any cluster of galaxies. ... It contains several hundred galaxies as they looked 3.5 billion years ago. The immense gravity in Abell 2744 acts as a gravitational lens to warp space and brighten and magnify images of nearly 3,000 distant background galaxies. The more distant galaxies appear as they did longer than 12 billion years ago, not long after the Big Bang. ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B67B046B3-CAF9-4B5D-AA62-9790D6A092C7%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B8A946391-3566-421A-8A3D-95269CD45FD4%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B6058FA25-BEB1-44D6-A843-C325D7EECD13%7D

... Confirmation that a mysterious cloud of hydrogen in the Virgo Cluster is a dark galaxy has been published by a team of astronomers . New evidence from NASA's Hubble Space Telescope and the Westerbork Synthesis Radio Telescope in the Netherlands has been used to rule out all but one of the ideas put forward to explain the existence of VIRGOHI 21, an intergalactic gas cloud 50 million light-years from the Earth. ... Only Dark Matter can account for the existence of such a system. ...

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• Astronomy at AO
• I-GALFA Reveals Dynamic Events in Our Galaxy
• HISA Poster for the 33rd Annual Meeting of CASCA, May, 2002

Title: A New Model of the Gravitational Lens 0957+561 and a Limit on the Hubble Constant . Authors: Norman A. Grogin , Ramesh Narayan (Harvard Univ.) ... Title: ROSAT/PSPC observation of the distant cluster CL0939+472 . ... Title: Interaction in the Bimodal Galaxy Cluster A3528 . ... Title: Cosmological Implications of Galaxy Cluster Evolution . ... Title: Galaxy Cluster Virial Masses and Omega . ... Matches 201 to 222 from a total of 222 matches for the search pattern galaxy cluster . ...

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• Radio galaxies
• astro-ph authors/title/abstract search for 'galaxy environment' all years
• Informational system "Evolution of RG"