Astronomy Picture of the Day . The Hydrogen Clouds of M33 . ... 26.12.2013 . ... Lemmon SkyCenter , U. Arizona Explanation: Gorgeous spiral galaxy M33 seems to have more than its fair share of glowing hydrogen gas. ... Its inner 30,000 light-years are shown in this telescopic galaxy portrait that enhances the reddish ionized hydrogen clouds or HII regions . ... December 2013 . ... Publications with keywords: hydrogen - HII region . Publications with words: hydrogen - HII region . ...

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• N159 and the Papillon Nebula
• Massive Stars of 30 Doradus
• R136: The Massive Stars of 30 Doradus

... 2005 December 11 . R136: The Massive Stars of 30 Doradus . ... NASA . Explanation: In the center of star-forming region 30 Doradus lies a huge cluster of the largest, hottest, most massive stars known. These stars, known as the star cluster R136 , and part of the surrounding nebula are captured here in this gorgeous visible-light image from the Hubble Space Telescope . ... About APOD | ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...

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• APOD: 2003 December 21 - N159 and the Papillon Nebula
• APOD: 2006 December 20 - Star Forming Region NGC 6357
• APOD: 2006 December 27 - IC 5067: Emission Nebula Close up

... 1999, A , 350, 917 . ... Shock heated NH3 in a molecular jet associated with a high-mass young star . ... 1999, ApJL, in press . ... 1999, A , in press . ... 1999, in "The First Stars", eds. A. Weiss, T. Abel and M. Norman, in press . The formation of primordial stars . ... 1999, in "Star Formation 1999", ed. T. Nakamoto, in press . ... T. Jacq, A. Baudry, C.M. Walmsley, P. Caselli . ... 1999, ApJ, in press . ... Star Formation . ... Osservatorio Astrofisico di Arcetri . ... Star Formation Group . ...

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... The Tarantula Nebula , also known as 30 Doradus and NGC 2070 , is a large region of ionized gas surrounding a collection of newly-forming stars at the eastern end of the stellar bar in the Large Magellanic Cloud (many similar regions are scattered through the LMC; see Kennicutt et al. ... The false-color image above is a log-scale display of a mosaic of several images taken with a CCD camera on the 0.6m Curtis Schmidt telescope at Cerro Tololo Inter-American Observatory in December 1994. ...

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• I-GALFA View of a Galactic Tangent Region

... GSAOI Home . ... Science . ... Deep imaging at J , H , and K is required to identify all stellar objects, brown dwarfs, and planetary mass objects in the central region of the Orion Nebula Cluster down to masses comparable to that of Jupiter. This is required to establish the initial mass function, i.e., the number of stars of each mass that have formed, in this region of intense massive star formation. ... The fields of the GSAOI detectors are shown as four green squares in each frame. ...

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• The Music of the Spheres
• GSAOI Magellanic Cloud Planetary Nebulae Science Page
• IAU Commission #34 (Interstellar Matter)

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. ...

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• LABOCA observations of giant molecular clouds in the southwest region of the
• Spitzer View of Young Massive Stars in the Large Magellanic Cloud H II Complex
• HST this week: 331

... An investigation of the molecular clouds of the Carina HII region/molecular cloud complex - First results . ... The Carina Nebula is an extremely bright southern HII region embedded in a giant molecular cloud and contains some of the most massive stars known in our Galaxy. ... Here we present the results of the initial molecular cloud observations which were made by observing the 12CO(1-0) emission with the Mopra antenna . ... HII regions -- ISM: clouds, kinematics and dynamics -- stars: formation ....

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• ATNF Colloquium
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... The RAS Meteorite Collection: State on the 1 st of June, 1999 . ... About the laboratory . ... Chondrite . ... Fall 15 April 1857. One mass of about 3 kg . ... Turkmenia, Chardgou region . ... One mass of 71.6 g . ... One mass of 1912 g . ... One mass of 841.6 g . ... Fall 13 September 1937. 15 masses totaling more than 210 kg . ... One mass of 1540 g . ... One mass of 11.335 kg . ... One mass of 2904 g. 2853 g . ... One mass of 115 g . ... One mass of 2788 g . ... One mass of 135 kg . ...

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Star formation is often best manifested by bright H II regions.These are regions of hydrogen which have been ionized by ultraviolet photons which are emitted from massive stars (typically stars more than 20 times the mass of the Sun). ... A narrowband filter image centered on this wavelength will then readily reveal these H II regions and hence the current sites of star formation in a galaxy, The luminous blobs that can be seen here are all H II regions . ... NGC 3558 Visual . NGC 3558 Infrared . ...

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• Astronomy HyperText Book: Interstellar Medium
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Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... This image of the Tarantula Nebula comprises one of the largest mosaics ever assembled from Hubble photos and includes observations taken by HubbleтАЩs Wide Field Camera 3 and Advanced Camera for Surveys, combined with observations from the European Southern ObservatoryтАЩs MPG/ESO 2.2-metre telescope which trace the location of glowing hydrogen and oxygen. ... Subscribe to Astronotes . ...

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• Young Stars in the Small Magellanic Cloud | Astronotes
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• Kepler-11: a strange and crowded planetary system | Astronotes

This image, obtained during the late commissioning phase of the GeMS adaptive optics system, with the Gemini South AO Imager (GSAOI) on the night of December 28, 2012, reveals exquisite details in the outskirts of the Orion Nebula. ... In this image, the blue spots are clouds of gaseous iron "bullets" being propelled at supersonic speeds from a region of massive star formation outside, and below, this image's field of view. ... Credit: Gemini Observatory/AURA ...

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• Hubble's panoramic view of a turbulent star-making region | Astronomy.com
• An anarchic region of star formation captured | Astronomy.com
• Is emission nebula NGC 6334 a mini starburst region? | Astronomy.com

... 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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• C. Refereed Journal Publications 2001
• High-Mass Star Formation
• C. Refereed Journal Publications 2002

... Massive stars, having 10-150 masses of the Sun, with metallicities Z tens to hundreds times less than that of the Sun (Zo), are the main regulators of the galaxy formation and evolution processes in the early Universe. ... In this galaxy, using the 6 m BTA telescope, a new massive blue variable star with high luminosity (>=10 5 Sun's luminocities in visible light) was found. As far as its properties are concerned, this star falls into an LBV (Luminous Blue Variable) class of stars. ...

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• Metagalaxy sector, archive 2011
• articles_flera_en
• New LBV Star Discovered in the Galaxy

... Sun images . ... Sun flares . ... Active areas . December : 2015 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Coordinates and other characteristics of active regions are issued for December 09, 2015 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for December 09, 2015 00:31 UT . ...

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• Sunspots and active regions December 10, 2006
• Sunspots and active regions December 01, 2012
• Sunspots and active regions December 10, 2005

... no comet has been observed with an orbit that indicates that it came from interstellar space, . ... From this he proposed that comets reside in a vast cloud at the outer reaches of the solar system. ... Unfortunately, since the individual comets are so small and at such large distances, we have no direct evidence about the Oort Cloud. ... T he Kuiper Belt is a disk-shaped region past the orbit of Neptune roughly 30 to 100 AU from the Sun containing many small icy bodies. ... Small Bodies .. ...

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• Ganymede
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CATS home ] [ Back to CATS list ] [ ftp ] . 1989AJ.. ... Title: The use of IRAS data to define H II regions Authors: HUGHES, V. A.; MACLEOD, G. C. Affiliation: AB(Queen's University, Kingston, Canada) Journal: Astronomical Journal (ISSN 0004-6256), vol. 97, March 1989, p. 786-800. ... 786H A total of 2298 IR H II regions in the IRAS Point Source Catalog are identified to a confidence level of 77 percent. ... Criteria are from Hughes McLeod (1989). of HII regions in IRAS catalog: . ... 0.0 . ...

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• Introduction
• Density Determination
• Catalogue HII regions

... 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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• The AstroStat Slog Blog Archive Open and Shut [Equation of the Week]
• Watching the Stars go `Round and `Round
• Aims of ChASeM33?

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . ... ESO . ... Survey Telescopes . ... Star Clusters . ... In the centre, a small cluster of stars тАФ called Westerlund 2 тАФ has been found to be the home of one of the most massive double star systems known to astronomers. ... They are amongst the most massive stars known to astronomers. ... These are massive stars nearing the end of their lives, expelling vast quantities of material as their final...

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• ESO - Thesis Topic: The interplay of massive stars, gas and dust in very nearby
• ESO - Star and Planet Formation Workshop
• A claret-coloured cloud with a massive heart | ESO Australia

... 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. ...

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• Dept. for Physics of Stars&Galaxies