... M82 s Middle Mass Black Hole . ... Black holes are probably the most bizarre creatures in the modern astronomical zoo. And after years of pondering black holes as either stellar mass objects seen in binary star systems or enormous supermassive black holes at the centers of galaxies, astronomers now have strong evidence . Comet LINEAR: Fade To Black . ... Antarctic Ozone Hole Widens . ... Andromeda Island Universe . ... IC 418: The Spirograph Nebula . ... Emerging Planetary Nebula CRL 618 . ...

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... NASA's Hubble Space Telescope has provided a never-before-seen view of a warped disk flooded with a torrent of ultraviolet light from hot gas trapped around a suspected massive black hole. ... This composite image of the core of the galaxy was constructed by combining a visible light image taken with Hubble's Wide Field Planetary Camera 2 (WFPC2), with a separate image taken in ultraviolet light with the Faint Object Camera (FOC). ... The inset box shows Hubble Space Telescope's field of view. ...

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• Hubble Uncovers Dust Disk Around a Massive Black Hole (STScI-PRC98-22) A
• Hubble Provides Multiple Views of How to Feed a Black Hole (PRC98-14)

... HUBBLE UNCOVERS DUST DISK AROUND A MASSIVE BLACK HOLE . Resembling a gigantic hubcap in space, a 3,700 light-year-diameter dust disk encircles a 300 million solar-mass black hole in the center of the elliptical galaxy NGC 7052. ... Because the jets in NGC 7052 are not perpendicular to the disk, it may indicate that the black hole and the dust disk in NGC 7052 do not have a common origin. ... NGC 7052 is located in the constellation of Vulpecula, 191 million light-years from Earth. ...

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• Active galaxies and black holes
• Black holes in galactic nuclei
• A black hole in the nearby galaxy M32

... If the mass of the collapsing star is more than three solar masses, however, no force can prevent it from collapsing completely to become a black hole. What is a black hole? Mini black holes . ... For Further Reading About Black Holes A black hole is a region of space in which the pull of gravity is so strong that nothing can escape. ... A black hole with a mass less than three solar masses would not form on its own; its gravity is too weak to cause it to completely collapse in on itself. ...

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• ASP: Black Holes to Blackboards: Seeing the Light
• ASP: Black Holes to Blackboards: Getting a Global Sense
• ASP: Black Holes: An Introductory Resource List

... We have measured this "redshift" for the pink black holes, and allowed for it in our calculations. ... We see this effect in the emission from gas around these pink black holes, but it is far too small an effect to account for the pinkness. Thus the swirling motions of gas around or into the black holes cannot produc the colour. ... At first we thought that these things were normal blue black holes hidden behind clouds of interstellar dust, that absorbed the blue light and made them appear pink. ...

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• The Music of the Spheres
• IAU Commission #34 (Interstellar Matter)
• Showcase

... 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 event horizon is the boundary of a black hole) . ... When the supermassive star implodes (collapses under it?s own gravity) a black hole is formed. Many black holes have been found in the centres of galaxies. ... It was thought that black holes don?t give out any energy at all (except when engulfing stars). ... It is thought that as the stars pass near to the centre, they are pulled in by the black hole and forced to remain orbiting around the black hole. ...

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• Stars Beyond Maturity
• Strong Gravity in the Vicinity of Supermassive Black Holes - by Eamon Scullion,
• Astronomy Research Themes : Stellar Evolution

Blackholes Forum Message . Forums: . ... Blackholes I | ... Use Light Radited From Stars Orbiting The Black Hole . ... My understanding is that that is how black holes are detected. Photons that are claimed to be circling a black hole are actually within the event horizon. ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Black Hole Theory - an Astronomy Net Blackholes Forum Message
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• The River Model Of Black Holes - an Astronomy Net Blackholes2 Forum Message

... Tonight's Sky . ... Behemoth black hole found in an unlikely place . ... milky way . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Can black holes "die" in the way that white dwarfs fade? ... When a white dwarf is created, it is hot, but because no process is creating more energy, it soon starts to cool and no longer emits significant heat or light, fading out and becoming a black dwarf. ... Get instant access to subscriber content on Astronomy.com! ...

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• Bright planets meet at dusk | Astronomy.com
• Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets,
• Astronomy 101: Black holes | Astronomy.com

Today's APOD | ... Editor's choices for the most educational Astronomy Pictures of the Day about black holes: . ... If alone, a black hole would indeed appear quite black, but many black hole candidates are part of binary star systems . So how does a black hole binary system look different from a neutron star binary system ? ... A black hole system so equipped would appear much darker than a similar neutron star system. ... APOD: 2004 February 24 - X-Rays Indicate Star Ripped Up by Black Hole . ...

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• APOD: 2012 November 2 - The Black Hole in the Milky Way
• APOD: 2014 October 26 - Too Close to a Black Hole
• APOD: 2010 December 7 - Too Close to a Black Hole

... SS433 is a close binary system, one star is a supergiant, a second one is a black hole. ... Even a black hole cannot accept such an enormous mass flux, a supercritical accretion disk appears, all the excess gas glows up to several tens of thousands degrees and is ejected off the disk with enormous velocities. ... SAO researchers have found an evidence of the supercritical accretion onto a black hole in SS433, which follows from a brightness variability of the SS433 disk. ...

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• Detection of unique bright radio flare of X-ray binary

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Travel to E-ELT Armazones . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... ESO Science Newsletter . ... ESO 3.6-metre telescope . ... Early scientific highlight from the first few nights of the ULTRACAM observing campaign on the Very Large Telescope: light curves in the i''- (red) and g''-band (green) of the quiescent black-hole X-ray transient GU Muscae. ...

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• Feeding the Monster | ESO
• Light curves of the black-hole GU Muscae | ESO Ireland
• Light curves of the black-hole GU Muscae | ESO United States

... MAO main . ... The DRAGON globular cluster simulations: a million stars, black holes and gravitational waves . ... simulations of globular clusters with a million stars on the high-performance . ... of stars in globular clusters at unprecedented detail but also shed light into . the dark world of black holes. ... clusters of single and binary black holes. ... of a globular cluster. www.mpa-garching.mpg.de/328833/hl201603 . ... MAO/NASU, 27 Akademika Zabolotnoho St. 03680 Kyiv, Ukraine . ...

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• MAO NASU :: Topic: 1st Announcement IAU Symposium 312 Star Clusters and Black

Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries . Two different types of stellar BH formation exist: (1) direct core collapse   of a massive star and (2) AIC of a NS. A BH of the first type presumably will have a mass comparable to that of the collapsing star and can be born both from a single star and in a binary system. ... Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries Mike E. Prokhorov . ...

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• Binary Radiopulsars with Black Holes
• Black Holes
• Black Holes in Binaries

. Next: Luminosity decay Up: Supernovae and their remnants Previous: The nature of supernovae . љ . Failure of central energy supply . Gravitational collapse . Nature depends on mass . Core mass: . 1.9 - 2.5 M neutron star (type II) . < 1.9 M no remnant (type Ia) . > 2.5 M black hole (type II) . Core collapse causes neutrino emission . Core bounce causes explosion . Few hours delay between neutrinos and light . Jon Bell . Thu Dec 19 15:15:11 GMT 1996

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• Southern Cross Astrophysics Conference Series
• Merging Black Holes in Galaxies: Galaxy Evolution, AGN and Gravitational Waves
• Evolutionary Paths in Galaxy Morphology

... X-rays are made up of photons that are emitted from stars, or quasars, or supernovae, the sun, or simply: anything that is undergoing a change either in size or temperature or giving out heat. ... in an X-ray binary star system, in which one normal star's orbit is crossed by a neutron star, when the neutron star by means of gravitational pull takes matter from the normal star X-rays form. ... Artists conception of a normal star (HDE 226868) and a black hole taking matter from the normal star. ...

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• Black Hole X-ray Binaries with Massive Companions
• Candidate Black Hole X-ray Binaries
• Black Hole X-ray Binaries with Low Mass Companions

... V4641 Sgr is known as a detached binary containing a 9 Msol. black hole and an A0 type companion. ... Spectra of V4641 Sgr were taken by us using SAO 1-m telescope between May 23.972 and 24.002 UT (the orbital phase of 0.35), wavelength range 3900-7500A, resolution 8A, S/N~30-40. ... These observations show essential light excess over the quiet light level seen only in the orbital phases between -0.25 and +0.25 with the maximum value of 0.15 mag in the V band at the black hole inferior conjunction. ...

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• http://jet.sao.ru/jet/~goray/kv2005fl.htm
• http://jet.sao.ru/jet/~bars/transients-e.pdf
• About laboratory

Astronotes Armagh Planetarium's Stellar Blog! ... Colin Johnston . ... Milky Way . Stars . ... Monthly Sky Notes . ... June . ... This red supergiant is the brightest star in the constellation Scorpius and is of awesome size. ... Returning to Vega (which will be the pole star in about 12 000 years from now), follow an imaginary line between it and Arcturus, this line will cross two more constellations, faint and sprawling Hercules and that celestial smile Corona Borealis. ...

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• ESA | Astronotes - Part 2
• ESO reveals end of cosmic Dark ages | Astronotes
• The Lagoon Nebula (M8) reveals its secrets | Astronotes

The black hole. ... The black holes are generated in the result of a collapse of giant stars with the mass more than three Sun's masses. ... And moreover the gas near the neutron star or the black hole will get hot and will become a source of high energetic electromagnetic radiation in X-rays and gamma range. ... In the majority of double systems, being the sources of X-rays radiation, the invisible component mass does not exceed the two solar masses, so it is a neutron star. ...

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... 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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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Mad Science