... Stars, Dust and Nebula in NGC 2170 . ... A textbook case is the star forming region NGC 2170 . Visible above are red glowing emission nebulas of hydrogen , blue reflection nebulas of dust , dark absorption nebulas of dust, and the stars that formed from them. ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: reflection nebula - emission nebula . Publications with words: reflection nebula - emission nebula . ... Emission Nebula IC 1396 . ...

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• Stars, Dust and Nebula in NGC 6559
• Star Forming Region S106
• Massive Stars in NGC 6357

... 2001 February 20 . Star Forming Region S106 . ... Explanation: Massive star IRS4 is beginning to spread its wings. Born only about 100,000 years ago, material streaming out from this newborn star has formed the nebula dubbed Sharpless 106 Nebula (S106), pictured above . ... S106 gas near IRS4 acts as an emission nebula as it emits light after being ionized , while dust far from IRS4 reflects light from the central star and so acts as a reflection nebula . ... About APOD | ...

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• APOD: 2016 February 16 - Star Forming Region S106
• APOD: 2001 February 16 - Star Forming Region Hubble X
• APOD: 2016 February 5 - Massive Stars in NGC 6357

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 . ...

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... 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

Molecular clouds under the influence of massive stars in the Galactic HII region G353.2+0.9 . A. Giannetti, J. Brand, F. Massi, A. Tieftrunk, M. Beltran . 2011, A , in press . ... R. Cesaroni, M.T. Beltran, Q. Zhang, H. Beuther, C. Fallscheer . ... Triggered star formation at the borders of the HII region Sh 2-217 . ... Choose a year to examine the list of available publications . ... Other sites where preprints on star formation are available: . SFN (Star Formation Newsletter) . ...

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... Star Atlas . ... solar system . ... stars . ... Observe the Solar System . ... What factors determine if a massive star (say, 100 solar masses) forms instead of a Sun-like star? ... Stars of all masses form from dense clumps within exceptionally cold molecular clouds. ... Massive stars tend to form at the centers of high-mass reservoirs of gas. Get instant access to subscriber content on Astronomy.com! ... A gamma-ray burst hints that LIGO's double black holes started as one massive star . ...

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• If a supernovaт??s original star is massive enough to form a black hole, why is
• Do globular clusters form in a galaxy's halo or migrate in from outside? If the
• New study resolves mystery of how massive stars form | Astronomy.com

home publications > mercury . ... Big Clusters, Tiny Galaxies . ... Astronomers struggle to understand why giant star clusters form in the tiniest of galaxies . ... These clusters are probably young versions of globular clusters, but they are commonly called super star clusters. Seven dwarf galaxies within 16 million light-years have formed super star clusters, with one of these galaxies, NGC 1569, possessing two young clusters. ... Super star clusters have a lot to tell us about star formation. ...

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• ASP: The Fiery Birth of Chondrules
• ASP: Maria and Eric Muhlmann Award Nomination Form
• ASP: Las Cumbres Amateur Outreach Award Nomination Form

... As a new Puerto Rican resident, you have a complicated tax status. The short answer for US citizens coming from the US is that you file 1040 claiming all your income for the year you moved, but with form(s) 1116 (credit for foreign tax paid) to reclaim the portion of your Federal tax attributable to income earned (and tax paid) in Puerto Rico. ... Form 1040 and Instructions. ... Publication 514 ``Foreign Tax Credit'', which contains the real instructions for form 1116. ...

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• The Tarantula Nebula
• AO RSS: Contact Form
• Astronomy at AO

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Space Flight . ... A glorious cosmic butterffly imaged by the HST (Image credit: NASA/ESA) . This dramatic image looks like some vast cosmic eruption, and that impression is entirely correct. ... Designated NGC 6302 and often called the Butterfly Nebula, this is an example of a planetary nebula. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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• What is a nebula? | Astronotes
• How do galaxies form? - New discovery from European Southern Observatory |
• The Lagoon Nebula (M8) reveals its secrets | Astronotes

Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries . Two different types of stellar BH formation exist: (1) direct core collapse   of a massive star and (2) AIC of a NS. A BH of the first type presumably will have a mass comparable to that of the collapsing star and can be born both from a single star and in a binary system. ... Next: Binary Radiopulsars with Black Up: Black Holes in Binaries Previous: Black Holes in Binaries Mike E. Prokhorov . ...

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• Massive X-ray Binaries
• Why do Radiopulsars not Usually Form Pairs with Normal Stars?
• Initial parameters of compact stars

Dust emission from the Type II supernova SN 2002hh in NGC 6946 has been detected at mid-infrared wavelengths by the Spitzer Space Telescope from 590 to 758 days after outburst and confirmed by higher angular resolution Gemini North mid-IR observations. ... The minimum emitting radius of 1.1У?1017 cm is too large for the emitting dust to have been formed in the supernova ejecta. ... ADS Citation Query . citations = 25 . ... 2006,6][2007,4][2008,2][2009,4][2010,2][2011,3][2012,1][2013,2][2015,1] . ...

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• Swara's Research interests
• Herschel Detects a Massive Dust Reservoir in Supernova 1987A
• Massive-Star Supernovae as Major Dust Factories

... 2000: . The images and maps of polarization for a massive protostar S140 IRS1, immersed in a dark molecular cloud were obtained at the 6-m telescope using speckle interferometry in the infrared 2.2 micron band. According to the structure of the flocky envelope around the nascent star it was found that the bright emission was caused by the reflection of radiation from the inner walls of the cavity formed by a powerful molecular outflow from the protostar. ... Archive . ...

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• Large telescopes application form
• Galaxy sector, archive 2008
• Ratan-600 application form

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 . ...

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• Thesis abstract
• Numerical simulations on the relative importance of starbursts and AGN in
• Radio's role in studying massive stars

... Galaxy formation and evolution is one of the key problems of modern astronomy. Galaxies in the universe come in a large variety of shapes and sizes, which we refer to as the Hubble sequence. The study of galaxy formation and evolution aims at explaining this variety as well as its statistical properties. Though the formation, and to some extent the evolution of galaxies still is one of the most active research areas in astrophysics. ...

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• Jorick Vink
• High-Mass Star Formation
• M.D. Smith, Research Astronomer

. Our publications September 2008 . February 2011 . Kniazev Alexei 1997 year. PhD thesis "The elaboration of methodics to search for Blue Compact Galaxies and detailed studies of some selected BCGs" . Short form (in Russian) . Full text (HTML format, in Russian) . Full text (in Russian, ps-file ~2.4Mbt) . Ugryumov Andrei 1997 year. PhD thesis "The Creation of the Samples of Blue Compact Galaxies and analysis of their spatial distribution" . Short form (in Russian) .

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• "Structure" publications in 2001 year
• "Structure" publications in 1996 year
• "Structure" publications in 2008 year

... For SIMS (Secondary Ion Mass Spectrometry) analysis, a solid surface is bombarded by primary ions of some keV energy. ... The subsequent mass analysis of the emitted ions provides detailed information on the elemental and molecular composition of the surface. ... Extremely short ion pulses with a duration below . ... By rastering a fine-focussed ion beam over the surface, like an electron beam in an electron microprobe, mass resolved secondary ion images (chemical maps) can be obtained...

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... Crescent Nebula . ... Above the Crescent are the Lynd's Bright Nebulae LBN 215, to the right is the filamentary LBN 208 and below is LBN 193. Hubble Palette, 5 nm Narrowband filters, S-II (Red Channel): H-alpha (Green Channel): O-III (Blue Channel) - 30: 55: 40 minutes, 5 minute subframe, binned 1x1, Total= 125 minutes, Takahashi Epsilon-180, SBIG STL-6303E CCD camera, ATMoB Clubhouse, Westford, MA, 13 August 2010. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: High-Contrast Imaging of Planet-Forming Disks in Intermediate-Mass Young Stars . ... ESO-MIDAS . ... ESO HST Image Galleries . ... history, and the different processes that act to dissipate the disks around young stars from which these planets have formed. Using recently obtained data with SPHERE, the new high-contrast imaging facility at ESO's Very Large Telescope, the PhD project . ... intermediate-mass stars. ...

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• A Massive Star Forming in M17 | ESO
• ESO - Thesis Topic: The interplay of massive stars, gas and dust in very nearby
• A Massive Star Forming in M17 | ESO Ireland

... We have examined the diversity of planets and planetary systems that arise from oligarchic growth and gas accretion onto massive cores, by means of N-body simulations combined with a sophisticated disc model. ... Slow planetary growth resulted from the relatively low mass of solids in the disc, and one consequence of this is that planets underwent limited orbital migration during the lifetime of the gas disc. ... Figure 1 shows an example of this migration behaviour in a single-planetin-a-disc run. ...

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• amaze
• Publications | Matt Bothwell
• Galaxy Evolution: Cosmological evolution of star formation

... 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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• Publications
• Publication directory
• The 7th Orlov Conference