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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• Galaxy Gallery Page III

... 2001 August 16 . Centaurus A: X-Rays from an Active Galaxy . ... CXO , NASA . ... Astronomers were not disappointed, as Centaurus A's appearance in x-rays makes its classification as an active galaxy easy to appreciate. ... Blasting toward the upper left corner of the picture, the jet seems to arise from the galaxy's bright central x-ray source -- suspected of harboring a black hole with a million or so times the mass of the Sun. ... About APOD | ... NASA Technical Rep.: ...

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• APOD: 2003 July 5 - Centaurus A: X-Rays from an Active Galaxy
• APOD: 2014 February 24 - The Cloudy Cores of Active Galaxies
• APOD: 2008 January 10 - Active Galaxy Centaurus A

... The Cloudy Cores of Active Galaxies . ... Credit Copyright: NASA's GSFC , W. Steffen ( UNAM ) Explanation: What would it look like to travel to the center of an active galaxy? Most galactic centers are thought to house black hole s millions of times more massive than our Sun. ... Publications with keywords: Galactic Center . Publications with words: Galactic Center . ... A Laser Strike at the Galactic Center . ... The Diner at the Center of the Galaxy . Kona Galaxy Garden . ...

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• Centaurus A: X-Rays from an Active Galaxy
• Centaurus A: X Rays from an Active Galaxy
• Астронет > Centaurus A: X-Rays from an Active Galaxy

... 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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• Lack of Dwarf Galaxies in the Local Volume Compared to Conventional Cosmology

Black holes . ... Black holes are objects for which the gravitational attraction is so strong that nothing, not even light, can escape from it. ... The material inside a black hole is concentrated into a singularity: a single point of infinitely high density where space and time are infinitely distorted. ... The existence of such black holes has been inferred in cases where the black hole pulls gas of a companion star that orbits around it. ... Gravity's Fatal Atraction: Black Holes in The Universe. ...

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• Black holes in galactic nuclei
• The Demography of Super-massive Black Holes
• Scientific American: Ask the Experts About Astronomy

... 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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... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Travel to ESO Headquarters . ... Visits to ESO Sites . ... Architecture at ESO . Collaborations with ESO . ESO Acronyms . ... Galaxies . ... View shopping cart . ... Active Optics . ... This wide-field image shows the patch of sky around the distant active galaxy PKS 1830-211. This view was created from photographs forming part of the Digitized Sky Survey 2. ... ESO/Digitized Sky Survey 2. ... PKS 1830-211 . ...

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• Zooming in on the distant active galaxy PKS 1830-211 | ESO
• Zooming in on the distant active galaxy PKS 1830-211 | ESO United States
• Zooming in on the distant active galaxy PKS 1830-211 | ESO Ireland

... 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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• CYlindrical GAmma-ray Monitor CYGAM -
• Цикл работ по исследованию сверхтонкой структуры AGN объек-тов, включая

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

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• Strong Gravity in the Vicinity of Supermassive Black Holes - by Eamon Scullion,

... Furthermore, they are all radio sources and in two cases, Sco X-1 and Cir X-1, the radio emission has been resolved into relativistic jets. Figure 1: X-ray colour-colour diagram for the newly-discovered source XTE J1701-462, displaying the three branches characteristic of a "Z source". ... In January 2006, for the first time, a new, transient, Z source was discovered: XTE J1701-462 was rapidly identified as a member of this exclusive class by its characteristic X-ray timing behaviour (Homan et al. ...

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• The peculiar galaxy NGC 4258: A black hole candidate.
• ATNF Colloquium
• Science Rationale

... NASA's Hubble Space Telescope offers a stunning unprecedented close-up view of a turbulent firestorm of starbirth along a nearly edge-on dust disk girdling Centaurus A, the nearest active galaxy to Earth. A ground-based telescopic view (upper left insert) shows that the dust lane girdles the entire elliptical galaxy. This lane has long been considered the dust remnant of a smaller spiral galaxy that merged with the large elliptical galaxy. ...

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• Black Holes explained by an astrophysicist
• A universal physical relation for quasars
• STScI- PRC99-10: Hubble's Infrared Galaxy Gallery

... 773Veron-Cetty Veron . Quasars (brighter than absolute magnitude -23) 85221 . ... Active galaxies (fainter than -23) 21737 . VII/248 Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006) ================================================================================ Quasars and Active Galactic Nuclei (12th Ed.) Veron-Cetty M.P., Veron P. =2006A .. ... 374, 92 (Catalogue ) (11) Veron-Cetty M.P., Veron P., 2003, Astron. ...

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• Group IAG
• AGN, Condon, Condon, Hazard
• The ROSAT AGN

You might wonder how a black hole could be found if nothing including light can escape from it. ... HDE 226868 is a massive blue supergiant star; its companion is believed to be a black hole, surrounded by an accretion disc of gases from HDE 226868 which are spiraling into the black hole. ... Three other objects -- LMC X-3 in the Large Magellanic Cloud galaxy, and A0620-00 and V404 Cygni in our galaxy -- are also believed to have black holes as one of their components. ...

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• ASP: Beacons in the Gloom
• ASP: Astronomy in the News
• ASP: Book Review

. This artist's concept shows a "feeding," or active, supermassive black hole with a jet streaming outward at nearly the speed of light. Such active black holes are often found at the hearts of elliptical galaxies. Not all black holes have jets, but when they do, the jets can be pointed in any direction. If a jet happens to shine at Earth, the object is called a blazar. NASA/JPL-Caltech

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• active galactic nuclei | Astronomy.com
• Continent-sized radio telescope takes close-ups of Fermi active galaxies |
• View more active galactic nuclei | Astronomy.com

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Our Galaxy . ... Stars . ... Space Flight . ... This activity is believed to be promoting the unusually high rate of star formation seen in M82. ... Radio image of M82 made with the MERLIN and VLA telescopes. Insets show MERLIN images from April 25th and May 3rd 2009 demonstrating the sudden appearance of the mystery object.€а All images are at a frequency of 5 GHz. ... Mystery object in Starburst Galaxy M82 . ...

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• galaxies | Astronotes
• Rings Around an Asteroid | Astronotes
• Other Galaxies | Astronotes

As a service to the astronomical community, we are recalibrating all archival Hubble Space Telescope Faint Object Spectrograph UV and optical spectrophotometry of active galaxies and quasars in order to extract uniformly calibrated spectrophotometric data for further detailed scientific investigations. ... NGC 4151 CLOUD F . NGC 5548 . ... NGC 4395 . ... NGC 4486 . ... NGC 4486 JET KNOT-A . ... NGC 4486 CLOUD-A . ... NGC 3031 . ... NGC 1068 . ... NGC 1068 CLOUD A . ... 1413+117A . ... NGC 4151 . ...

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• The AstroStat Slog Blog Archive [ArXiv] Decision Tree, Aug. 31, 2007
• dictionary
• The AstroStat Slog training data

... X-ray sources in galaxies: active nuclei, primodal black holes or microquasars . The last findings in observations of point-like X-ray sources in galaxies are reported. ... A new class of objects has been discovered - the Ultraluminous X-ray (ULX) sources, which could be as black holes of intermediate mass (100-1000 suns), being captured by galaxies and spiralling in because of dynamical friction, or microquasars (SS433-like stars), being orientated "face-on". ...

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• Gravitational Wave Background from Individual Galaxies

Blackholes Forum Message . Forums: . ... Black Holes And RedShift . ... Perhaps black holes really are the reproductive means of the universe.Could the black hole of a Quasar red-shift the electromagnetic energy trying to escape it? ... Perhaps black holes treat electromagnetic energy the same way. ... No one really knows enough about Quasars and black holes to say for sure but ask yourself this: Why would all the Quasars in the universe be moving away from the Milky Way? ... www.astronomy.net . ...

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• Deep Space Object Galaxy Near M13 - an Astronomy Net General Forum Message
• Black-hole Galaxy Model Of Dark Matter - an Astronomy Net Blackholes2 Forum

... 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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• TESIS - Telescopes for EUV Spectral Imaging of the Sun

Proposal Identification No.: A2196 Date Received: 2006-Jan-30 13:17:10 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Prop osal Title: Regular Astronomy Spectroscopy Extragalactic 96 Hours HI Emission Profiles in AGN Hosts: A New Strategy to Test the Black Hole-Host Galaxy Paradigm ABSTRACT: Recent surveys of black holes in the centers of nearby galaxies strongly suggest a close connection between black hole growth and galaxy formation. ...

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• http://www.naic.edu/vscience/schedule/tpfiles/HotagA2196tp.ps
• http://www.naic.edu/vscience/schedule/tpfiles/LeetagA1359tp.ps
• http://www.naic.edu/~astro/frontiers/NewScieComa_Apr07.pdf