... Open Cluster M25 . ... Many stars like our Sun were formed in open clusters. ... The bright young stars in M25 appear blue. ... Known as an extremophile, bacteria such as D. NGC 7771 Galaxy Group . ... Known as the NGC 7771 Group, they lie almost 200 million light-years away toward the high flying constellation Pegasus. NGC 7822 in Cepheus . ... At the edge of a giant molecular cloud toward the northern constellation Cepheus, the glowing star forming region lies about 3,000 light-years away. ...

Еще в разделе: (Показать все результаты (>131214) - www.astronet.ru/ )

• Star Clusters Young and Old

... 2000 October 22 . Wild Duck Open Cluster M11 . ... Explanation: Many stars like our Sun were formed in open clusters . The above open cluster, M11 , contains thousands of stars and is just over three thousand light years distant. ... Open clusters , also called galactic clusters, contain fewer and younger stars than globular clusters . Also unlike globular clusters, open clusters are generally confined to the plane of our Galaxy . ... About APOD | ...

Еще в разделе: (Показать все результаты (>6114) - www.sai.msu.su/ )

• APOD: 2010 October 17 - NGC 346 in the Small Magellanic Cloud
• APOD: October 14, 1996 - Bright Stars, Dim Galaxy
• APOD: 2014 October 8 - NGC 6823: Cloud Sculpting 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! ...

Еще в разделе: (Показать все результаты (>2805) - www.armaghplanet.com/ )

• NGC4666: Secrets of a Starburst Galaxy | Astronotes

... 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. ...

Еще в разделе: (Показать все результаты (>7713) - www.arcetri.astro.it/ )

• APOD: October 18, 1999 - NGC 3603: An Active Star Cluster
• Hubble Reveals Stellar Fireworks Accompanying Galaxy Collision PRC97-34a
• A Bright Ring Of Star Birth Around A Galaxy's Core (PR98-21)

... 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. ...

Еще в разделе: (Показать все результаты (>273) - www.badastronomy.com/ )

... Science User Portal . ... Travel and Contacts . ... Galaxy Clusters . ... Star Clusters . ... This chart shows the constellation of Puppis (The Poop) and includes all the stars that can be seen with the unaided eye on a clear and dark night. This region of the sky includes some bright star clusters, chief amongst them Messier 47 (circled) and its contrasting sister cluster Messier 46. Both clusters are well seen in small telescopes, with Messier 47 having far fewer, but brighter, stars. ...

Еще в разделе: (Показать все результаты (>52247) - www.eso.org/ )

• The bright star cluster Messier 7 in the constellation of Scorpius | ESO
• The location of the bright star cluster NGC 3532 in the constellation of Carina
• AdelePlunkettAstro

Why areNuclear Star Clusters interesting? 1) Many -- if not all ­ nuclear star clusters appear to be young, or at least have a young population of stars. ... 3) If nuclear clusters indeed form in the galaxy center, their impact on the dynamics of stars and gas in the central region of the host galaxy needs to be understood, because it can potentially influence the galaxy morphology. For example, it has been suggested that nuclear clusters can destroy stellar bars and thus form galaxy bulges. ...

Еще в разделе: (Показать все результаты (>12972) - www.stsci.edu/ )

• HST this week: 271
• HST this week: 269
• HST this week: 301

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. ...

Еще в разделе: (Показать все результаты (>1158) - www.astrosociety.org/ )

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. ...

Еще в разделе: (Показать все результаты (>1279) - www.mso.anu.edu.au/ )

• http://www.mso.anu.edu.au/seminars/abstracts/20150220-1400.html
• http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html
• http://www.mso.anu.edu.au/seminars/abstracts/20151013-1100.html

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. ...

Еще в разделе: (Показать все результаты (>6735) - www.astronomy.com/ )

• Do globular clusters form in a galaxy's halo or migrate in from outside? If the
• New cluster is an ancient object | Astronomy.com
• Young, hot, and blue: stars in cluster NGC 2547 | Astronomy.com

Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

Еще в разделе: (Показать все результаты (>262) - zebu.uoregon.edu/ )

• Astronomy HyperText Book: Interstellar Medium
• Astro-2 and the UIT Experiment
• Constrains on Dark Matter

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

Еще в разделе: (Показать все результаты (>950) - www.rochesterastronomy.org/ )

... 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. ...

Еще в разделе: (Показать все результаты (>406) - www.atmob.org/ )

• Amateur Telescope Makers of Boston ATMoB Observing Awards Program

... In the past used to check pn/ MOS cross calibration Example of old vs new pn/ mos Residuals in the form of ratio data / model for PN data on MOS best fitting model Example of old vs new pn/ mos Residuals in the form of ratio data / model for PN data on MOS best fitting model ACIS S3 vs EPIC pn · · Same thing, only now we compare Chandra ACIS S3 with ... Flux cross-cal · · The new HRMA calibration impacts on the ACIS/EPIC flux cross calibration. ...

Еще в разделе: (Показать все результаты (>3149) - xmm.vilspa.esa.es/ )

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Portrait of Sir William Herschel (1738-1822) Royal Astronomical Society . Probably the most famous astronomer of the 18th century, Sir William Herschel discovered, in addition to the planet Uranus, many new nebulae, clusters of stars and binary stars. ... Other Herschel Family Portraits . Mirror by Herschel . Return to A Short History of Armagh Observatory . Last Revised: 2009 November 23rd . ...

Еще в разделе: (Показать все результаты (>2801) - star.arm.ac.uk/ )

• Armagh Observatory
• Grubb 10 inch Refractor
• Objects in the Sky

... 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) ...

Еще в разделе: (Показать все результаты (>2074) - www.naic.edu/ )

• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• Star Names

... 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. ...

Еще в разделе: (Показать все результаты (>339) - www.wro.org/ )

• The M111 - "OnLine"

... The routines implemented are CLUSTER which has 8 options for hierarchical clustering and PARTITION which carries out non--hierarchical clustering. ... The former is non--hierarchical clustering or partitioning. The latter is hierarchical clustering. Brief consideration will show that a sequence of n-1 agglomerations are needed to successively merge the two closest objects and/or clusters at each stage, so that we have a set of n (singleton) clusters, n-1 clusters, ..., 2 clusters, 1 cluster. ...

Еще в разделе: (Показать все результаты (>1049) - www.sao.ru/ )

• Clusters of Galaxies
• CCD photometry
• A 20 cm VLA survey of Abell clusters of galaxies

... 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. ...

Еще в разделе: (Показать все результаты (>471) - www.mao.kiev.ua/ )

• MAO NASU :: Topic: 1st Announcement IAU Symposium 312 Star Clusters and Black
• Dept. for Physics of Stars&Galaxies
• The Laboratory of Astrometry

... This paper ( Burke et al. 2003 ) describes the creation of one such catalogue - the Southern Serendipitous High-redshift Archival ROSAT Cluster (SHARC) survey - which covers an area of 17.7 deg 2 and consists of 32 clusters with redshifts between 0.05 and 0.7 and X-ray luminosities between 7 x 10 42 and 4 x 10 44 erg/s: the high-redshift subsample contains 16 clusters with = 0.3 and X-ray luminosities greater than 2 x 10 43 erg/s (luminosities are quoted for the 0.5 - 2.0 keV energy band). ... 1997 ...

Еще в разделе: (Показать все результаты (>2605) - hea-www.harvard.edu/ )

• SAO Summer Intern Program Projects, 2004
• The AstroStat Slog Globular Clusters
• Reading Quiz