... The Quintuplet Star Cluster . ... Bright clusters of stars form and disperse near the center of our Galaxy. ... The Quintuplet Cluster is located within 100 light-years of the Galactic center, and is home to the brightest star yet cataloged in our Galaxy: the Pistol Star. ... Visible to the unaided eye as a fuzzy patch in the constellation of Orion, this image taken with the Big Throughput Camera shows the Orion Nebula to be a busy neighborhood of young stars, hot gas, and dark dust. ...

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... August 23, 1996 . NGC 3293: A Bright Young Open Cluster . ... Explanation: Hot Blue stars shine brightly in this beautiful, recently formed galactic or "open" star cluster. Open cluster NGC 3293 is located in the constellation Carina , lies at a distance of about 8000 light years, and has a particularly high abundance of these young bright stars. ... If true, star formation in this open cluster took at least 15 million years. ... About APOD | ...

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• APOD: 2009 August 3 - T Tauri: A Star is Formed
• APOD: 2000 August 22 - NGC 2244: A Star Cluster in the Rosette Nebula
• APOD: 2001 August 20 - The Lagoon Nebula in Three Colors

... STScI-PRC00-25 A DYING STAR IN GLOBULAR CLUSTER M15 The globular cluster Messier 15 is shown in this color image obtained with the NASA Hubble Space Telescope's Wide Field Planetary Camera 2 (WFPC2). ... Known as Kuestner 648, this was the first planetary nebula to be identified in a globular cluster. ... At the present time, the most massive stars remaining in M15 have about 80 percent of the mass of our Sun, a fact that makes the existence of a planetary nebula like K 648 something of a mystery. ...

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• APOD: August 6, 1998 - Infrared Horsehead
• APOD: August 28, 1998 - Hydrogen Trifid
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster

Astronotes Armagh Planetarium's Stellar Blog! ... Comets and Asteroids . ... Image credit:ESO/J.Emerson/VISTA. ... However others are less pessimistic and it has even been claimed that the mysterious ?Wow! signal? received in 1977 originated from the direction M55.б  Sadly, this still unexplained pulse of radio energy originated from a location rather to the northwest of M55 so I doubt if the source was this cluster (if indeed the signal was genuinely of extraterrestrial origin). ... Mysterious Wow! ...

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• WLM Galaxy: a Cosmic Living Fossil | Astronotes

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

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• http://www.mso.anu.edu.au/seminars/abstracts/20150220-1400.html
• Blue Straggler Stars
• GSAOI Orion Nebula Cluster Science Page

... Harry Teplitz, California Institute of Technology . ... Abstract . ... Carole A. Haswell, Open University . ... Binaries in the Kuiper Belt: Probes of Solar System Formation and Evolution . ... Planet formation occurs in circumstellar disks around young stars. ... Most of the targets are early-type stars, with spectral types ranging from late-B to mid-G. 7 231 . ... Star-star interactions can lead to truncation of nascent disks, disruption of binary systems and even ejection from the cluster. ...

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• HST this week: 239
• HST this week: 211
• The M87 Globular Cluster System Revisited

An eight-billion-year-old cluster of stars 13,000 light-years from Earth, called NGC 6791, can be seen in the image. ... This particular cluster is called an open cluster, because the stars are loosely bound and have started to spread out from each other. The area pictured is 0.2 percent of Kepler's full field of view, and shows hundreds of stars in the constellation Lyra. The image has been color-coded so that brighter stars appear white, and fainter stars, red. ...

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• The Hubble Space Telescope found a galaxy that was completely formed within 480
• Do globular clusters form in a galaxy's halo or migrate in from outside? If the
• An older open cluster takes a turn in the spotlight | Astronomy.com

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

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• Astronomy HyperText Book: Stellar Clusters
• Low Surface Brightness Galaxy Gallery
• Astro-2 and the UIT Experiment

... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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National Aeronautics and Space Administration . ... JOHN E. BLAHA (COLONEL, USAF, RET.) NASA ASTRONAUT (FORMER) . ... EDUCATION: Graduated from Granby High School in Norfolk, Virginia, in 1960; received a bachelor of science in engineering science from the United States Air Force Academy in 1965 and a master of science in astronautical engineering from Purdue University in 1966. ... NASA EXPERIENCE: Selected as an astronaut in May 1980, Blaha has logged 161 days in space on 5 space missions. ...

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• Astronaut Bio: Robert L. Stewart
• Astronaut Bio: Lee Joseph Archambault (3/2013)
• Astronaut Bio: Mark C. Lee 10/2006

Note that different students may see different quiz forms.) ... Giant stars are rare because . a) they do not form as often as main sequence stars. b) giant stars are unstable. c) the giant stage is very short compared to the main sequence stage. d) elements heavier than helium are relatively rare. In a color-magnitude diagram of a star cluster, the blue end of the main sequence is useful for defining the age of the cluster because . ... 2) Some idea. 3) Good idea. ...

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• Reading Quiz PAUL J. GREEN - ConcepTests
• The AstroStat Slog Blog Archive my first AAS. IV. clustering
• The AstroStat Slog Blog Archive [ArXiv] Bimodal Color Distribution in GCS,

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . Travel to ESO Headquarters . ... Survey Telescopes . ... Star Clusters . ... FLAMES . ... 100 Hours of Astronomy . ... IMAX€о 3D Film Hidden Universe . ... This image, the first to be released publicly from VISTA, the worldтАЩs largest survey telescope, shows the spectacular star-forming region known as the Flame Nebula, or NGC 2024, in the constellation of Orion (the Hunter) and its surroundings. ...

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• The bright star cluster NGC 6520 and the strangely shaped dark cloud Barnard 86
• Zooming in on a stellar nursery in Corona Australis | ESO
• Panning across the star cluster NGC 6520 and the dark cloud Barnard 86 | ESO

... Bad Astronomy . ... Bitesize Astronomy . ... The next step up are true clusters, called open clusters . Open clusters (sometimes misleadingly called "galactic clusters") are groups of stars ranging in size from a few dozen stars up to tens of thousands. ... The youngest is about 1 or 2 million years old, while the oldest is about 6 or 7 billion years, making it just older than our own solar system. ... So by looking at the stars in the cluster we can tell pretty well how old they are. ...

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• Phil Plait's Bad Astronomy: Bad News

... Future seminars . P a s t seminars . Seminar council . Stability of cold fronts in clusters of galaxies " . E. Churazov (IKI, MPA) . ... One of the insteresting results of Chandra and XMM-Newton observatories is the discovery of sharp structures in the X-ray surface brightness of galaxy clusters. These structures (a.k.a. cold fronts) are likely associated with the contacted discontinuities formed when a hot gas flows over a colder gravitationally bound gas cloud. ...

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• (S-7a) The Black Hole at the Center of our Galaxy

... All previous such superstars have been found along with many companion stars in the centres of crowded star clusters. The star is known as VFTS 682 from the VLT-FLAMES Tarantula Survey catalogue of the European Southern Observatory's Very Large Telescope (VLT) located at Paranal in Chile by means of the attached FLAMES instrument. ... Although VFTS 682 seems to be alone now it is not very far away from a very rich star cluster known as RMC 136 that contains several similar superstars. ...

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• William Herschel
• Stars Beyond Maturity
• M.D. Smith, Research Astronomer

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

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• ASP: Black Holes to Blackboards: Drifting Through Andromeda
• ASP: Monster Comet Promises Big Show
• ASP: More About Deep Space Objects and Cosmic Terms

THE SUBSYSTEMS OF THE MILKY WAY HALO. ... A catalogue of homogeneous fundamental astrophysical parameters for 145 globular clusters is composed on the base of the data of compilative catalogue by Harris (1997) and from another literature. ... In addition, it has large rotation velocity ( V rot =77?33 km/s), appreciable radial and vertical metallicity gradients equal by value, and has the oldest average age (subsystem of the old halo). ... Characteristic parameter of globular cluster subsystems. ...

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• Population of Galactic globular clusters, figures

... With the stars gamma Can and delta Can , it forms another asterisms called " the Asses and the Manger ". ... Formed by the stars delta Ori, epsilon Ori and zeta Ori ; in Latin America it is called the " Three Marys ". ... Built by the four stars alpha UMa, beta UMa, gamma UMa and delta UMa . ... Formed by the four stars alpha Del , beta Del , gamma Del and delta Del . ... Also on Orion; the belt stars ( delta Ori , epsilon Ori and zeta Ori ), the sword and eta Ori build up this asterism. ...

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• Under a Dog Day Sky August 1999

... This image shows a 7th magnitude star cluster, it's reflection nebula, an extended diffuse nebula and Barnard Dark Nebulae. The bright star at the top is omicron Persei (Atik). The cluster next to Atik is a star forming region with as many as 300 stars ranging from the brightest at B5 to low mass brown dwarfs. ... The obscuring dark areas are the Barnard Dark Nebulae 1 through 4. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... Dept. for Physics of Stars&Galaxies . ... Using a database view Sloan Digital Sky Survey (SDSS), containing almost a million spectra created 15,000 sample galaxies with active star formation, which is used for various studies and physical state of evolution of galaxies. ... Star clusters of the Galaxy . The project MWSC (Milky Way Star Clusters) directory using 2MASS, which includes nearly 500 million vision to the limit Ks = 15.3, analyzed more than 4,000 cluster-like objects in the galaxy. ...

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• MAO NASU :: Topic: 1st Announcement IAU Symposium 312 Star Clusters and Black
• Dept. for Physics of Stars&Galaxies
• Pre-registration form