... 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. ...

... 2015 July 26 . The Sombrero Galaxy from Hubble . Image Credit: Hubble Heritage Team ( AURA / STScI / NASA ) . Explanation: Why does the Sombrero Galaxy look like a hat? Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on . Billions of old stars cause the diffuse glow of the extended central bulge. ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... Credit Copyright: NASA , ESA , and The Hubble Heritage Team ( STSci / AURA ) Explanation: What's happening to this spiral galaxy? Just a few hundred million years ago, NGC 2936, the upper of the two large galaxies shown , was likely a normal spiral galaxy -- spinning, creating stars -- and minding its own business. ... Alternatively, the galaxy pair, together known as Arp 142 , look to some like a penguin protecting an egg. ... The Colliding Spiral Galaxies of Arp 271 . ... Arp 272 . ...

... 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. ...

... STScI-PRC01-04 HUBBLE'S ULTRAVIOLET VIEWS OF NEARBY GALAXIES YIELD CLUES TO EARLY UNIVERSE Astronomers are using these three NASA Hubble Space Telescope images to help tackle the question of why distant galaxies have such odd shapes, appearing markedly different from the typical elliptical and spiral galaxies seen in the nearby universe. ... Light from these galaxies travels great distances (billions of light-years) to reach Earth. ... These stars emit mostly ultraviolet light. ...

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 . ...

... Armagh Planetarium . ... Universe . ... September . ... Posted on September 27, 2010 | ... This new Hubble Space Telescope image shows that M66 seems to have been through the mangle. ... You can find out in this issue of Astronotes) . ... No Comments Dark matter and its part in the evolution of the Universe is revealed by new data collected by the Hubble Space Telescope. ... Newer Entries . ... Here you will find the latest news and views from the fascinating worlds of astronomy and space...

... These Frontier Fields will combine the power of HST with the natural gravitational telescopes of high-magnification clusters of galaxies. ... We are soliciting gravitational lensing maps for the last four Hubble Frontier Fields clusters (MACSJ0717.5+3745, MACSJ1149.5+2223, AbellS1063, and Abell 370) based upon the exceptionally deep HST FF imaging and other new ancillary data. ... For the full set of proposal instructions and requirements, see the FY16 Frontier Fields Lensing Map Call for Proposals....

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 . ...

... galaxies . ... Hubble rules out one alternative to dark energy . ... Astronomers using NASA's Hubble Space Telescope have ruled out an alternate theory on the nature of dark energy after recalculating the expansion rate of the universe to unprecedented accuracy. ... The Hubble observations were conducted by the Supernova Ho for the Equation of State (SHOES) team that works to refine the accuracy of the Hubble constant to a precision that allows for a better characterization of dark energy's behavior...

... 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. ...

Blackholes Forum Message . Forums: . ... Alternative Idea . ... With the proposal of exotic super dense entities like quark stars and others including black holes, matter on the atomic level can, and most likely does, break down to its most simplist building blocks (photons, leptons, quarks, etc). ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . GALAXIES . This Hubble Space Telescope image shows a selection of galaxies great "islands" of billions of stars seen in every direction our telescopes can look. ... The galaxy that appears so large at the upper left is 300 million lightyears away -- so far that light from it takes 300 million years to reach us. Some of the galaxies that look smaller are even further away. ... Return to An Ancient Universe . ...

... The expansion is measured as a number called the Hubble Constant . ... Our value is about 20% lower than the one got with the Hubble Space Telescope in 1994," said Dr Jim Lovell, leader of the team that made the measurement. The Hubble Constant is named after American astronomer Edwin Hubble, who in the 1920s found that other galaxies were moving away from ours. ... The Hubble Constant links the galaxy's distance with its speed." ... A short run-down on the Hubble Constant: . ...

... The new emission line galaxies are listed in Table 2 containing the following information: . column 1: The object's IAU-type name with the prefix HS. column 2: Right ascension for epoch B1950. column 3: Declination for epoch B1950. ... The spectra of all emission-line galaxies are shown in the Appendix A. The results of line flux measurements are given in Table 4. ... column 1: The object's IAU-type name with the prefix HS. column 2: Observed flux (in 10 -16 ergs -1 cm -2 ) of the H 4861 ? ...

... fran?ais . ... A galaxy is often described as an enormous group of stars. ... Our galaxy, the Milky Way, is a spiral galaxy. ... And of course, spiral galaxies have enormous arms that wind around the centre, like the twirling skirt on a ballroom dancer. ... This picture, taken by the Very Large Telescope, shows a group of young stars called an Open Cluster . In spiral galaxies, open clusters are normally found inside the spiral arms. ... Our Galaxy contain around 1000 open clusters! ...

ATMoB "Galaxy Observing Award " Guidelines Purpose: To promote observing among the membership of the Amateur Telescope Makers of Boston through participation in the Galaxy Observing Awards program. ... Examples of elliptical galaxies: M49, M59, M60, M87, NGC 4125. Limiting Magnitude Assessment: Spirals: A spiral galaxy consists of a flattened disk, with stars forming a (usually two-armed) spiral structure, and a central concentration of stars known as the bulge. ...

. Last updated 18 Mar 1999 . The ported software list for XFree86/OS2 is currently under construction. You can find the old pages at this link . In the future, you might find it likely here Trouble that the URLs below are not reachable? Try to look at alternative sites that archive stuff: . set.gmd.de . crydee.sai.msu.su . www.powerusersbbs.com . Reply to: Holger.Veit@gmd.de .

... Courtesy of NASA/ESA Observation data (J2000 epoch) Constellation Right ascension Declination Redshift Distance Type Serpens Caput 15h 17m 14.4s[] +21° 35 08[] 12,740±50 km/s[][1] 600±30 Mly (183±8 Mpc)[1] SA0(r) [citation needed ] [a] Apparent dimensions (V) 0.28 в 0.28[] Apparent magnitude (V) 16.0[] Notable features Ring galaxy Other designations PGC 54559,[] PRC D-51[] See also: Galaxy, List of galaxies Hoag's Object is a non-typical galaxy of the type known as a ring galaxy. ...

... Astrophysics Group . ... Galaxies and Quasars . ... All galaxies emit radio waves as well as light. ... Often, they shoot out two jets, magnetic fields and very fast electrons (see below). ... This explains why we often see one very bright jet ? ... Quasars, the most powerful sources, often show a prominent jet, strong radio galaxies like the one to the right more usually don?t. The most powerful of these radio sources can be detected at immense distances in the Universe ? ...