... 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: May 15, 1998 - TRACE and the Active Sun
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster

... NGC 3603: An Active Star Cluster . ... ISAAC , VLT , ESO 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 . ... Publications with keywords: star cluster - star formation - HII region - open cluster . Publications with words: star cluster - star formation - HII region - open cluster . ...

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• Астронет > NGC 3603: An Active Star Cluster
• XWare > APOD

... 2008 August 22 . Active Galaxy NGC 1275 . Credit: NASA , ESA , Hubble Heritage ( STScI / AURA ); . ... Explanation: Active galaxy NGC 1275 is the central, dominant member of the large and relatively nearby Perseus Cluster of Galaxies . ... This stunning visible light image from the Hubble Space Telescope shows galactic debris and filaments of glowing gas, some up to 20,000 light-years long. ... What keeps the filaments together? ... About APOD | ... A service of: ASD at NASA / GSFC . ...

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• APOD: 2010 June 4 - Hubble Remix: Active Galaxy NGC 1275
• APOD: 2013 October 6 - Hubble Remix: Active Galaxy NGC 1275
• APOD: 2014 July 5 - M106 Across the Spectrum

... 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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... Science . ... Science Users Information > Science Publications > Science Announcements > Clustering Measurements of Active Galactic Nuclei . ... Observing Facilities . ... ESO Data . ... Galaxies and active galactic nuclei (AGN) are not randomly distributed in the Universe. ... This ESO workshop, which will be the first ever dedicated workshop on AGN clustering, aims to summarise our current understanding of AGN clustering and how the community should prepare for upcoming data sets and challenges. ...

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• Visiting with an Old and Active Friend (ESO PR Photos 07a-b/01)
• The Active Galaxy NGC 4945 | ESO
• Bright X-Ray Cluster Acts As Strong Gravitational Lens | ESO

... Today this year's largest group of sunspots will cross the Sun's central meridian. ... The next day, the number of spots in the group reached five, and the day after, on June 2nd, it was possible to count thirteen sunspots on solar disk, which had been clear prior to this. ... This year's two most powerful active areas, which passed across the solar disk at the beginning of May, 2009, are set to appear in the Sun's eastern sector in two days, on June 6th. ...

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• Sunspots and active regions January 10, 2007
• Sunspots and active regions January 01, 2014
• Sunspots and active regions January 10, 2012

Galaxies are diffuse objects which are imaged against a background of finite brightness and noise. Galaxies which have the maximum contrast with respect to this background are the ones that are first discovered. ... These galaxies have been missed to date but active surveys for them are underway. ... In this page we present several examples of these newly discovered Low Surface Brightness galaxies as well as examples of high surface brightness galaxies. ...

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• Astronomy HyperText Book: Stellar Clusters
• Astro-2 and the UIT Experiment
• The Galaxy Gallery: Messier Objects

... Tonight's Sky . ... NASA satellite reveals active galaxies are different near and far . ... An ongoing X-ray survey undertaken by NASA's Swift spacecraft is revealing differences between nearby active galaxies and those located about halfway across the universe. ... Nearly a decade ago, surveys with NASA's Chandra X-Ray Observatory and the European Space Agency's XMM-Newton showed that active galaxies some 7 billion light-years away were mostly massive "red and dead" galaxies in normal environments....

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• View more active galactic nuclei | Astronomy.com
• Continent-sized radio telescope takes close-ups of Fermi active galaxies |
• RXTE reveals the cloudy cores of active galaxies | Astronomy.com

documentstyle{preprint} \begin{document} \title{MASSIVE STAR EVOLUTION IN DIFFERENT ENVIRONMENTS\/\thanks{Invited review to appear in ``Active Galactic Nuclei, Dense Stellar Systems, and their Environments,'' Eds.\ S.~A.\ Lamb, J.~J.\ Perry, ASP Conf.~ ... Comparisons between evolutionary models and observations of massive OB, WR stars and related objects are presented. ... Another environmental effect, which might affect stellar evolution is a cluster environment with a high stellar density. ...

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• A Deep Wide Area I-Band Survey
• WFPC2 Instrument Handbook Update
• Spitzer Observations of MAMBO Galaxies: Weeding Out Active Nuclei in

... 773Veron-Cetty Veron . Quasars (brighter than absolute magnitude -23) 85221 . ... Active galaxies (fainter than -23) 21737 . VII/248 Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006) ================================================================================ Quasars and Active Galactic Nuclei (12th Ed.) Veron-Cetty M.P., Veron P. =2006A .. ... 374, 92 (Catalogue ) (11) Veron-Cetty M.P., Veron P., 2003, Astron. ...

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• A 20 cm VLA survey of Abell clusters of galaxies
• Group IAG
• Summary

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

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• NGC4666: Secrets of a Starburst Galaxy | Astronotes
• Hubble shows us a spectacular star cluster | Astronotes
• Leonid meteors 2011 | Astronotes

... Прекрасный вклад в развитие малыша – это игровой развивающий центр «Чудесный сад 360» от Bright Starts. ... В развивающем центре имеется специальный сектор пианино, который имеет возможность работы в нескольких режимах: различные звуки, мелодии и пианино. ... Развивающий центр 'Чудесный сад 360' станет настоящим подарком для любого ребенка. ... Бюстгальтеры и топы . ... Материал верха: натуральная кожа . ... Материал подошвы: термопластиковая резина . ... Материал: натуральная кожа...

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• Наволочка из перкали - AM.PM. - AM.PM. Кеды Zenden Active
• Кроссовки Zenden Active - Zenden Active - Zenden Active fashion наручные
• Кроссовки Zenden Active - Zenden Active - Zenden Active Тепловая пушка Roda

... 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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• What is HISA?
• Mythology of the Seven Sisters (Pleiads)

... Projects . Data transfer . ... PPTA projects and allocations . ... Time active (d) . ... Not active . ... PPTA data release 2 . ... unallocated Study timing noise in PPTA pulsars . ... unallocated Reprocess P140 data with PPTA pipeline . ... unallocated Consider the optimal observing strategy for PPTA pulsars . ... unallocated Application of cyclic spectroscopy to PPTA pulsars . ... Profile Domain Pulsar Timing: Developing and applying techniques to PPTA data. ... Tue, 24 Nov 15 03:36:53 +0000 . ...

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• Active Optics
• AGN workshop
• The Active Algol Binary KZ Pavonis

... 2 April 1999 . The Nobeyama Radioheliograph data show that in the microwave range, besides large-scale trans-equatorial chains (see, e.g., the May 11-15, 1993 and November 1-4, 1993 events), there are also many examples displaying large and strongly evolving "longitudinal" or "internal" chains connecting remote active regions inside an active zone in one (northern or southern) hemisphere (the August 20-September 3, 1998 event). ... Last update: 2 April 1999 . ...

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• Non-traditional methods of geophysical investigations and active plasma
• Chains and CMEs
• APEX/Intro

... For us to see them from such great distances, quasars must be producing enormous energy -- they are about 1000 times brighter than an average galaxy! ... One of their choices for the energy source of quasars was a black hole. ... On the one hand, it may seem difficult to think that mere friction between bits of matter could account for the energy of a quasar, but, on the other hand, gravity is unimaginably strong near a black hole. ... How does matter actually rush towards the black hole? ...

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• ASP: Star Science in the Autumn Sky
• ASP: Monster Comet Promises Big Show
• ASP: Astronomy in the News

Active Galactic Nuclei: from Central Engine to Host Galaxy ASP Conference Series, Vol. xxx, 2003 S. Collin, F. Combes, and I. Shlosman Hydrodynamic Simulations of Light Bipolar Large Scale Jets Martin Krause Max Camenzind Landessternwarte Heidelberg-Konigstuhl, 69117 Heidelberg, Germany Abstract. ... We nd that the jet bow shock undergoes two phases: First a nearly spherical one and second the well-known cigar- shaped one. ... It gets compressed into a smooth neutral shell (phase 2, t=3 Ma). ...

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• http://www.mrao.cam.ac.uk/~tm419/downloads/Graduate_student_poster.pdf
• http://www.mrao.cam.ac.uk/~bn204/mk2/publications/2004/dusty04-gmrt-spitzer-poster.pdf
• Astrophysics Group AMI Science

... 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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• J.G. Doyle, Research Astronomer
• Terry Mosely's Bulletins
• Solar Active Region 10999 by Deirdre Kelleghan | International Year of

This page is devoted to information on Supernova 1999eb in NGC 664 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main supernova page. Information on the original web pages for many of these images can be found on the Supernova links web page. ... Normally, I wait until I get about 6 or so images before starting a web page for a specific SN, with 3 images and a spectrum the first day, I decided to get started while I had time. ...

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• Supernova 1999cl in M88
• Supernova 1998T in NGC 3690
• Bright Supernova - Archives

. Authors: A.A. Suchkov , V.A. Marakov . Journal: Pis'ma Astron. Zh., 1976, v.2, p.38-385. Metallisity function of globular clusters in the Galaxy is constructed. It is found to have three "humps". This leads to a conclusion that there were three metal enrichment outbursts during the period of globular cluster formation. The constraints on the nature of metal sourses and on the early evolution of Galaxy are considered.

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