... 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 July 20 - AR9077: Solar Magnetic Arcade
• APOD: June 16, 1998 - An Active Region of the Sun

... 2014 February 24 . The Cloudy Cores of Active Galaxies . Image Credit: NASA's GSFC , W. Steffen ( UNAM ) . Explanation: What would it look like to travel to the center of an active galaxy? Most galactic centers are thought to house black hole s millions of times more massive than our Sun. The spaces surrounding these supermassive black holes may be far from dormant, however, flickering in many colors and earning the entire object class the title of Active Galactic Nuclei (AGN). ...

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• APOD: 2008 January 10 - Active Galaxy Centaurus A
• APOD: 2003 July 5 - Centaurus A: X-Rays from an Active Galaxy
• APOD: 2001 August 16 - Centaurus A: X-Rays from an Active Galaxy

... 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
• Centaurus A: X-Rays from an Active Galaxy
• Centaurus A: X Rays from an Active Galaxy

Black holes . ... Black holes are objects for which the gravitational attraction is so strong that nothing, not even light, can escape from it. ... The material inside a black hole is concentrated into a singularity: a single point of infinitely high density where space and time are infinitely distorted. ... The existence of such black holes has been inferred in cases where the black hole pulls gas of a companion star that orbits around it. ... Gravity's Fatal Atraction: Black Holes in The Universe. ...

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• Research Groups
• STScI Active Galaxies Lunch Talk Series
• The Demography of Super-massive Black Holes

... ESO PR Photo 07a/01 . ... ESO PR Photo 07b/01 . ... Caption : PR Photo 07a/01 shows Comet Hale-Bopp , still active at a distance of nearly 2,000 million kilometres from the Sun. ... This is quite unusual for a comet and is clearly confirmed on the present photo ( PR Photo 07a/01 ) from the WFI camera on the MPG/ESO 2.2-m telescope at La Silla, obtained a few days ago. ... ESO-Chile . ... ESO PR Photos 07a-b/01 may be reproduced, if credit is given to the European Southern Observatory (ESO). ...

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• ESO - star07
• The active galaxy NGC 3783 in the constellation of Centaurus
• ESO - Clustering Measurements of Active Galactic Nuclei

... Research . ... A rare hybrid morphology radio galaxy . ... In this project we will be able to investigate the environmental effect on star formation and galaxy evolution in individual galaxies falling into the cluster through radio observations of active galactic nuclei (AGN). Current models of galaxy evolution regulate the star formation rates within the simulated galaxies by invoking radio-mode feedback from AGN. ... Julie.Banfield@anu.edu.au . ...

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• Towards a Truly Unified Model of AGN

... 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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• Active supermassive black holes revealed in merging galaxies | Astronomy.com
• View more active galactic nuclei | Astronomy.com
• RXTE reveals the cloudy cores of active galaxies | Astronomy.com

... Future seminars . P a s t seminars . ... Radiation-driven winds from stars and Active Galactic Nucle" . ... It is now clearly understood that the problem of mass loss is crucially important both from the point of view of it’s influence on the evolution of stars and for the explanation of physical processes and observational data in active galactic nuclei (AGN). ... Absorption of the radiation by continuum opacity is responsible for such an evolutionary significant mass loss in cold massive stars. ...

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

... Цвет: серый . ... Материал верха: искусственная замша, текстиль . ... Материал подошвы: полимер . ... Кроссовки Zenden Active. ... Материал: искусственная замша, текстиль. ... title=' Золотой подвес 01P214790 - Ювелирное изделие' border='0' align='left' width='120' style='margin-right: 20px;' hspace='7' vspace='5'/> Подвеска. ... Цвет: оранжевый . Материал: пластик . ... Тип: настольный . ... Классические шторы . Материал портьеры: Портьерная ткань . ... Тип: шторы . ... Шторы . ...

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

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

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• Project's diary
• Sunspots and active regions January 01, 2013
• Sunspots and active regions January 01, 2011

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ... active optics . ...

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• ATNF Daily Astronomy Picture
• PPTA Dashboard | Projects
• The Active Algol Binary KZ Pavonis

... In particular we searched for giant flares from nearby galaxies (~2--4 Mpc) M82, M83, NGC 253, and NGC 4945 in the BATSE data. No candidates alike giant SGR flares were found. ... Nevertheless, we do not see any significant excess of short GRBs from the Virgo galaxy cluster and from galaxies Arp 299 and NGC 3256 with extremely high star formation rate. ... With this constraint the fraction of possible extragalactic SGR hyperflares among BATSE short GRBs should not exceed few percents. ...

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• Black Hole Creation in Massive Binary Systems
• Massive X-ray Binaries
• Initial Distributions of Binary Parameters

... Milloins of years timescale . ... 500 million years ago (unclear) . ... Evidence from Fossil Record: 100-150 million year extinction periodicity ?? ... Climate Cycle ? ... Since the orbital period of the Sun around the center of the Galaxy is about 250 million years then every 100-150 million years the earth is in a spiral arm which is a region of high supernova density. ... Somewhere between 700 and 800 million years ago there was a 10 million year long period where the oceans were completely...

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• http://zebu.uoregon.edu/disted/ph123/lec13.html
• Fabry-Perot Images of Starburst Galaxies
• Astronomy HyperText Book: Stellar Clusters

Next: C.S. Jeffery, Research Astronomer Up: Research Previous: J.E. Chambers, Research Astronomer Contents . ... We examine spectral time-series of two lower-chromospheric lines observed with SUMER/SOHO (N I and C II ). ... Two examples of explosive events observed with SUMER/SOHO in transition region spectral lines are reported here; one detected in C IV 1548?, in a region within the northern polar coronal hole, and the other in O VI 1032?, in an active region. ...

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• Armagh Observatory
• Solar Active Region 10999 by Deirdre Kelleghan | International Year of
• High-Mass Star Formation

... 2002) Coordinated fueling: nearby AGN hosts Narrowline AGN hosts in SDSS: high M* and * but "black" rum younger stellar ages (not just in nucleus!) coordinated fueling of star formation and light rum accretion is key. ... Vermeulen et al. (2003): 33% of radioloud AGN (z < 0.8) show HI absorption features, more frequently (and more highly) blueshifted than redshifted. ... HI absorption against radioloud AGN traces a mixture of infall, outflow, and rotation; key fuel may be hot gas. ...

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• http://www.naic.edu/vscience/schedule/tpfiles/KneetagA2174tp.pdf
• http://www.naic.edu/vscience/schedule/tpfiles/KneetagA2174tp.ps
• http://www.naic.edu/vscience/schedule/tpfiles/HunttagA1167tp.ps

... A radio galaxy is a galaxy that emits an unusually big amount of energy at radio wavelengths. ... Inside of each galaxy with an active nucleus (radio galaxies are among them) there must be a system of a "central machine" responsible for the colossal amount of the emitted energy from radio to gamma ranges. ... Sometimes a radio source in an active galaxy may flare again if the needed conditions appear (a new portion of matter would fall into the furnace of the "central machine"). ...

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• Metagalaxy sector, archive 1995
• CH Cyg
• Detection of Radio Transients and Variable Radio Sources Using the Archive Data

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil La com†иte Chury toujours active . ... Cette photo prise le 1 er mars 2016, †а seulement 26,7 km de distance, met en †йvidence un beau jet de mati†иre qui s'†йchappe en bordure des r†йgions Imhotep et Bes, sur le lobe de l'h†йmisph†иre Sud de la com†иte. ... Etat du ciel ...

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• Eruption cosmique dans la galaxie M87 | Ciel et Espace

You might wonder how a black hole could be found if nothing including light can escape from it. ... HDE 226868 is a massive blue supergiant star; its companion is believed to be a black hole, surrounded by an accretion disc of gases from HDE 226868 which are spiraling into the black hole. ... Three other objects -- LMC X-3 in the Large Magellanic Cloud galaxy, and A0620-00 and V404 Cygni in our galaxy -- are also believed to have black holes as one of their components. ...

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• ASP: Book Review
• ASP: Astronomy in the News
• ASP: Astronomy Behind the Headlines

... Image Quality of the VLT . Total Optical Control . First light for the ESO VLT unit telescope 1 occurred during the workshop. ... The image shown (Figure 1 ) here was obtained with the VLT on May 16, 1998, in red light (R band), i.e. while the mirror was still uncoated. ... In this diagram (FIgure 2), the measured image quality of the VLT UT1 astronomical images is plotted versus the ``seeing", as measured by the Seeing Monitor, a small telescope also located on top of the Paranal Mountain. ...

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• ESLAB 2007

... 739C As one part of a program to detect complete samples of active extragalactic objects, the 3.36x10^-3 sr field centered on alpha=12h04min, delta=+11deg30' (1950.0) was mapped with the Very Large Array at 1411MHz. Sixty-seven maps cover this field so that no point is more than 15arcmin from the nearest map center. ... The rms map noise is 0.030 + 0.001 mJy, and the resulting source list is complete to a map peak flux density S_p = 0.2 mJy within 25 arcmin of the field center. ...

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• Quasars and Active Galactic Nuclei
• HwB: Active Filter: Linkwitz 24dB Lowpass
• HwB: Active Filter: Bessel 24dB Lowpass