... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2012 November 18 . NGC 6357: Cathedral to Massive Stars . Image Credit: NASA , ESA and Jes s Ma z Apell niz ( IAA , Spain) . Explanation: How massive can a normal star be? ... Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357 . ... About APOD | ... A service of: ASD at NASA / GSFC . ...

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• APOD: 2001 November 3 - Bright Stars, Dim Galaxy
• APOD: 2003 November 5 - The Lynx Arc
• APOD: 2006 December 19 - Massive Stars in Open Cluster Pismis 24

... Massive Stars in NGC 6357 . ... 9.10.2008 . ... Credit: Johannes Schedler ( Panther Observatory ) Explanation: Massive Stars lie within NGC 6357 , an expansive emission nebula complex some 8,000 light-years away in the tail of the constellation Scorpius . ... 2007 2008 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: star formation - emission nebula . Publications with words: star formation - emission nebula . ... Massive Stars in Open Cluster Pismis 24 . ...

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• Massive Stars in Open Cluster Pismis 24
• XWare > APOD
• NGC 3603: An Active Star Cluster

... October 18, 1999 . NGC 3603: An Active Star Cluster . ... Explanation: NGC 3603 is home to a massive star cluster, thick dust pillars, and a star about to explode . The central open cluster contains about 2000 bright stars, each of which is much brighter and more massive than our Sun . ... These stars are less massive than our Sun, demonstrating that great numbers of low-mass stars also form in active starburst regions . ... About APOD > . ...

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• APOD: November 12, 1996 - Comet Hale-Bopp Passes M14
• APOD: November 30, 1999 - Henize 70: A Superbubble in the LMC
• APOD: July 9, 1999 - NGC 7789: Galactic Star Cluster

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. ...

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• Low Surface Brightness Galaxy Gallery
• Astronomy HyperText Book: Interstellar Medium

XMM-Newton observation of the core of the massive cluster Cyg OB2 located in the constellation Cygnus, 4,700 light-years from Earth. The cluster contains massive O-type stars that shine brightly in X-rays. Cyg OB2 #9 is seen as the bright star just below the central star, and in 2008 was determined to be a binary system. ... Hundreds of lower mass stars also fill the field of view, which spans nearly 22 x 16 arcminutes. ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BEBF5D4F3-3099-4674-84E7-0F96BDBAE87C%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BC8FA6640-526C-420C-ABD8-6CFC688A41BF%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BEA4EFF95-DEAE-43D7-A61C-8AD2985E4801%7D

I will present theresults from a deep, extended, planetary nebulae survey in a 0.5 sqdeg region centered on the brightest cluster galaxy NGC 4486 (M87) in the Virgo cluster core, carried out with SuprimeCam@Subaru and FLAMES-GIRAFFE@VLT. ... A substructure detected in the projected phase-space of the line-of-sight velocity vs. major axis distance for the M87 halo planetary nebulae provides evidence for the recent accretion event of a satellite galaxy with luminosity twice that of M33. ...

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• GSAOI Orion Nebula Cluster Science Page
• IAU Commission #34 (Interstellar Matter)
• Julie Banfield | Astronomer

... Australia Telescope Compact Array . ... Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or Extremely Compact Dwarf Galaxies? ... We suggest that these objects are either super-massive star clusters (intra-cluster globular clusters or tidally stripped nuclei of dwarf galaxies) or a new type of low-luminosity compact elliptical dwarf (``M32-type'') galaxy. ... Keywords: galaxies: star clusters -- galaxies: dwarf -- galaxies: formation . ... Properties of the compact objects ...

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• ATNF Colloquium
• Evolutionary Paths in Galaxy Morphology
• An HI selected sample of galaxies -- The HI mass function and the surface

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Starbursts are short-lived events, stars are forming so quickly that the reservoirs of interstellar gas from which stars are coalescing would be used up on a timescale much shorter than the age of the galaxy . ... Strong stellar winds from giant new stars in the starburst region combine with the blasts of supernovae to push a mighty flood of extremely hot gas, a ?superwind? from the galaxy thousands of light years into intergalactic space. ...

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• stars | Astronotes - Part 6
• Omega Centauri: globular cluster of 300,000 stars | Astronotes
• Cepheids Inconstant Stars which break the rules | Astronotes

... Weidong Li, University of California - Berkeley . ... Abstract . ... The host galaxies of QSO2s: AGN feeding and evolution at high luminosities . ... Harald Ebeling, University of Hawaii . ... Searching for Lyman alpha Emission from FUSE Lyman Continuum Candidates . ... AGNs with Intermediate-mass Black Holes: Testing the Black Hole-Bulge Paradigm, Part II . ... HST FUV Observations of Brightest Cluster Galaxies: The Role of Star Formation in Cooling Flows and BCG Evolution . ... Past weeks: . ...

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• HST this week: 335
• HST this week: 315
• HST this week: 113

... It shows the bright stars of the Wishing Well Cluster, which earned its name because of the many stars that resemble silver coins sparkling at the bottom of a wishing well. ... All the stars in this cluster, for example, are around 300 million years old. The Wishing Well Cluster has a rich mix of around 400 red and blue stars. ... The most massive stars in the cluster aren t visible in this picture. ... In our Galaxy, you can tell how old a star cluster is based on where it s found. ...

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• ESO - star07
• ESO - Thesis Topic: Dynamical models of multiple globular cluster populations
• ESO - Central Massive Objects: The Stellar Nuclei - Black Hole Connection

Orbital intersection . ... Structure of Taurid stream . ... Meteoroid swarm and Taurid fireballs . ... The following four diagrams schematically show four different Taurid orbits and the orbits of Earth and Jupiter. ... The Taurid stream contains particles (small, solid grains) at different stages of their precession cycles. ... The study of when a meteor stream can produce a meteor shower is the study of when precession brings orbits to intersection with Earth, or e.g. with Mars . ...

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• Armagh Observatory
• High-Mass Star Formation
• Web Site Updates 2008

... Ultraluminous X-ray sources (ULXs) are located in external galaxies, their X-ray luminosities (10 39 - 10 41 erg/s) are thousand times greater than those of brightest black holes in the Galaxy. ULXs may be supercritical accretion disks around black holes of stellar masses (~10 Solar masses) like that in SS433, or they may be a hypothetical intermediate-mass black holes (hundreds - thousands Solar masses) with standard accretion disks. ... 2) The ULX progenitors were ejected from the star clusters. ...

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• articles_flera_en
• important_en
• New LBV Stars in the Andromeda Galaxy

... 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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• ALFALFA Dark Cloud
• Pulsar Highlights - A Dozen new MSPs in Globular Clusters

... Posts tagged ?massive data? ... Tags: bimodality , chi-square minimization , Classification , CMD , Estimation , machine learning , massive data , model based , PCA , spectral analysis , spectroscopic , survey , VO . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

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• Southern SHARC survey
• The AstroStat Slog globular cluster
• The AstroStat Slog Blog Archive Workshop on Algorithms for Modern Massive Data

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

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• ESLAB 2007
• NICMOS/HST H-band (F160W) Images of the 30 Dor Starburst Cluster

... Home Gallery Astrophotography Deep Sky Images by Joe DiNapoli . ... Deep Sky Images by Joe DiNapoli . ... Deep Sky Gallery by Ed Fox . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

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• Brooklyn Museum Plaza ? Amateur Astronomers Association of New York
• AAA Urban Starfest in Central Park ? Amateur Astronomers Association of New...
• Lecture Series 2015-2016 ? Amateur Astronomers Association of New York

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

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... We have made observations of the Perseus cluster with the Westerbork Telescope at 610 MHz. ... Several newly detected sources are identified with cluster galaxies. ... No evidence is found for the existence of the previously reported ~ 65'x25' cluster halo, 3C 84B. Key words: radio galaxies - clusters - tailed radio sources buoyancy The Perseus Cluster of galaxies is one of the most fascinating systems accessible to extragalactic astronomers. ...

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• Density Determination
• Nearby Galaxies Catalogue (NBG)
• Gravitational Lensing by Clusters of Galaxies

The LCDM paradigm: successes and challenges on scales of galaxies Anatoly Klypin (NMSU) LCDM · · · · DM profiles, concentrations, .. Clustering of galaxies: P(k) and correlation functions Satellites: abundance, number-density profiles Galaxies and Dark Matter: abundances Dwarfs. ... Springel et al 2008. ... Klypin et al 2010. ... Observations - LCDM: just enough Magellanic Clouds Observations LCDM Vmax > 50 km/s Busha et al 2010 Dark matter profiles: standard LCDM Aquarius simulation. ...

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• http://mavr.sao.ru/hq/katya/CosmosPh/en/Abstract_Sharina.txt
• Bispectrum Speckle Interferometry of the Massive Protostellar Object S140 IRS
• Main Researches Activities

... Astrophysics Group . ... AMI Science . ... Observations of galaxy clusters are central to the AMI science programme. The AMI Small Array is used to observe already-known clusters with high-sensitivity and resolution, allowing us to extract detailed information about individual clusters and to build up statistics about the cluster population. ... Observing galaxy clusters at 15 GHz is tricky because of the contamination from foreground radio sources, which is where the Large Array comes in! ...

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• Galaxy Evolution Over Five Decades
• The history of star formation and mass assembly in early-type galaxies Bojan