... The Clouds of Orion the Hunter . ... Cradled in cosmic dust and glowing hydrogen, stellar nurseries in Orion the Hunter lie at the edge of giant molecular clouds some 1,500 light-years away. ... Volcano of Fire Erupts Under the Stars . ... Galaxy and Cluster Create Four Images of Distant Supernova . ... Stars at the Galactic Center . ... Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602. ...

Еще в разделе: (Показать все результаты (>131189) - www.astronet.ru/ )

... We sometimes use the word "nebula" to refer to galaxies, various types of star clusters and various kinds of interstellar dust/gas clouds. ... Early in this century, there was a great debate as to the nature of the nebulae like this one which at that time could not be resolved into individual stars. ... A typical galaxy is 100,000 light-years in diameter. ... M 42 shown) Reflection nebulae are clouds of dust which are simply reflecting the light of a nearby star or stars. ... M 1 shown) . ...

Еще в разделе: (Показать все результаты (>6191) - www.sai.msu.su/ )

• APOD: 2005 December 12 - 30 Doradus: The Tarantula Zone
• APOD: 2004 December 28 - Tentacles of the Tarantula Nebula
• APOD: 2014 October 18 - Melotte 15 in the Heart

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 . ...

Еще в разделе: (Показать все результаты (>337) - zebu.uoregon.edu/ )

• Astronomy HyperText Book: Stellar Clusters

... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Large Magellanic Cloud, open cluster NGC 1664, and reflection nebula NGC 1788 . January 2 9, 2014: The Large Magellanic Cloud in Dorado is an excellent target for far-southern naked-eye observers, open cluster NGC 1664 in Auriga offers small-telescope owners nice views, and large-telescope owners can seek out reflection nebula NGC 1788 in Orion. ... Small telescope : Open cluster NGC 1664 . ...

Еще в разделе: (Показать все результаты (>6748) - www.astronomy.com/ )

• What factors determine if a massive star (say, 100 solar masses) forms instead
• Two open clusters in Canis Major, emission nebula NGC 2316, and spiral galaxy
• If a supernovaт??s original star is massive enough to form a black hole, why is

There is often dust associated with ionized regions. Compact HII regions usually have associated dust from a molecular cloud in which the massive star is being "born". ... For such stars the dust is not produced by the star, and a variety of dust features are observed. The planetary nebulae also usually have associated dust from the previous stage of evolution where they were either carbon stars or M-type giants. ... The feature near 11.5 microns in the IC 418 spectrum may be due to SiC dust. ...

Еще в разделе: (Показать все результаты (>12521) - www.stsci.edu/ )

• HST this week: 335
• Target Category and Target Description [Description]
• The Mass Accretion Rates of Intermediate-Mass T Tauri Stars

... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... Travel and Contacts . Travel to ESO Headquarters . ... Green ESO . ... Survey Telescopes . ... Star Clusters . ... Stars@ESO . ... View shopping cart . ... ESO 3.6-metre telescope . ... MPG/ESO 2.2-metre telescope . ... ESO 1-metre Schmidt telescope . ... VST . ... The glowing jumble of gas clouds visible in new image make up a huge stellar nursery nicknamed the Prawn Nebula. ... Milky Way : Nebula : Type : Star Formation . ...

Еще в разделе: (Показать все результаты (>66680) - www.eso.org/ )

• Cosmic Spider is Good Mother | ESO
• The Cosmic Bat | ESO
• The Rosette Nebula: A Cosmic Rose | ESO United Kingdom

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 (>650) - www.mso.anu.edu.au/ )

• GSAOI Orion Nebula Cluster Science Page
• The Music of the Spheres
• Blue Straggler Stars

... We address a question if globular clusters (GC) in a protogalaxy could for some time evolve chemically as isolated systems, enriching themselves with heavy elements produced in first supernova events that follow initial star formation. We determine both the critical mass of a protoglobular cluster that is needed to retain the ejecta of the very first supernova, and the critical energy (i.e., number of supernovae) that is needed to expel the residual gas from a cluster of a given mass. ...

Еще в разделе: (Показать все результаты (>41) - www.inasan.rssi.ru/ )

ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Information & tools for observers . ... Australia Telescope Online Archive (ATOA) . ... ATCA | ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... The Australia Telescope National Facility Colloquium . ...

Еще в разделе: (Показать все результаты (>14886) - www.atnf.csiro.au/ )

• Southern Cross Astrophysics Conference Series
• FCC 35
• WALLABY - the ASKAP HI All-Sky Survey

... Our Galaxy . ... Space Flight . ... No Comments Dim and isolated, the dwarf irregular galaxy WolfтАУLundmarkтАУMelotte (WLM) could be described as an astronomical тАЬliving fossilтАЭ as it seems to have developed since it formed billions of years ago [ ] . Continue Reading.. ... Posted on November 24, 2011 | ... 3 Comments The astronomy community is excited by the discovery of an exploding star, a supernova, in a galaxy 21 million light years away in the constellation Ursa Major. ...

Еще в разделе: (Показать все результаты (>2416) - www.armaghplanet.com/ )

• NGC 6302: A vast cosmic butterfly | Astronotes
• Nebulae | Astronotes
• Tarantula Nebula in stunning Hubble Image | Astronotes

... However, while low mass stars are usually found to form in loose groups with densities of a few stars per cubic parsecs, high mass stars are known to form in dense clusters with up to 10000 stars per cubic parsec. ... We have undertaken a survey of a cospicuous number of fields around intermediate mass young stars (Herbig Ae/Be stars, HAeBe) with the aim of detect and characterize the groups of young stars that may have formed together with the HAeBe star. ... BD +404124 - A rich, compact cluster. ...

Еще в разделе: (Показать все результаты (>6775) - www.arcetri.astro.it/ )

• Arcetri Star-Formation Group Publications

... Conditions are like those inside a white dwarf. ... It is not well understood what changes are caused inside the star, but the star certainly loses mass between leaving the main sequence and becoming a helium-burning horizontal branch star. When core helium burning ends, the low mass star rejoins the asymptotic giant branch, where the hydrogen and helium burning shells interact, causing a series of thermal pulses. ... Stars less than one third of a solar mass will not ignite helium at all. ...

Еще в разделе: (Показать все результаты (>2480) - star.arm.ac.uk/ )

• Armagh Observatory
• IAJ: News Views
• Research Interests

... 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 . ...

Еще в разделе: (Показать все результаты (>4126) - hea-www.harvard.edu/ )

• dictionary
• The AstroStat Slog globular cluster
• The AstroStat Slog Blog Archive [ArXiv] 1st week, Oct. 2007

... galaxies: bulges galaxies: clusters: general galaxies: clusters: individual: . ... star formation statistics stellar content structure Cosmology ( cosmology :) cosmic background radiation ( cosmology :) cosmological parameters cosmology : miscellaneous cosmology : observations cosmology : theory ( cosmology :) dark ages, reionization, first stars ( cosmology :) dark energy ( cosmology :) dark matter ( cosmology :) diffuse radiation ( cosmology :) distance scale ( cosmology :) early Universe (...

Еще в разделе: (Показать все результаты (>239) - mavr.sao.ru/ )

• articles_flera_en
• articles_alex_01
• Detection of unique bright radio flare of X-ray binary

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

Еще в разделе: (Показать все результаты (>617) - www.aaa.org/ )

• http://www.aaa.org/s932/images/09fallclass5.pdf
• http://www.aaa.org/s932/images/09fallclass3.pdf
• http://www.aaa.org/EyepieceFiles/aaa/2009_09_September_Eyepiece.pdf

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

Еще в разделе: (Показать все результаты (>714) - hea.iki.rssi.ru/ )

• z90-program

... Special Reports Giant space cloud may be powered by black holes 17:57 23 April 2007 NewScientist.com news service David Shiga An enormous cloud of roiling plasma in space may be drawing its energy from black holes, new observations suggest. Such clouds might be sources for the mysterious particles that occasionally crash into Earth's atmosphere at ultra - high speed. ... But higher energy particles in the cloud may be able to escape, he says. ...

Еще в разделе: (Показать все результаты (>2674) - www.naic.edu/ )

• Pulsar Highlights - A Dozen new MSPs in Globular Clusters
• ALFALFA Dark Cloud
• The Tarantula Nebula

... A faint, dusty rose of the northern sky, emission nebula IC 410 lies about 12,000 light-years away in the constellation Auriga. The cloud of glowing hydrogen gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. ... These "tadpoles" (seen just below center) are regions of denser, cooler gas, and more slowly resist the erosive radiation from the hot stars. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>66705) - www.atmob.org/ )

... Here is a brief outline of the current theory of the events in the early history of the solar system: . A cloud of interstellar gas and/or dust (the "solar nebula") is disturbed and collapses under its own gravity. ... The gas cools off enough for the metal, rock and (far enough from the forming star) ice to condense out into tiny particles. (i.e. some of the gas turns back into dust). ... Once the larger of these particles get big enough to have a nontrivial gravity, their growth accelerates. ...

Еще в разделе: (Показать все результаты (>654) - www.iki.rssi.ru/ )

• Positive Ions
• Cosmic Rays
• High Energy Particles

. F IGURE . 2. The mass-age relationship for the clusters lying inside (a) and outside (b) the solar circle. The stright lines are root-mean-square regressions, r are the corresponding correlation coefficients. The open triangles in diagram (b) show the clusters of anomalous mass the same as in Fig. 1b . discussion in the text | privious figure .

Еще в разделе: (Показать все результаты (>81) - ip.rsu.ru/ )

• Vladimir Marsakov Abstracts
• Population of Galactic globular clusters, figures
• T.Borkova, V.Marsakov, Distant globular clusters with anomalously small masses