... Scorpius in Red and Blue . ... Credit Copyright: John Davis Explanation: Cosmic dust clouds dim the light of background stars. But they also reflect the light of stars nearby. Since bright stars tend to radiate strongly in the blue portion of the visible spectrum, and the interstellar dust scatters blue light more strongly than red, the dusty reflection nebulae tend to be blue. ... Of course, the contrasting red emission nebulae are also caused by the hot stars' energetic radiation. ...

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• Reflection Nebula vdB1
• A Beautiful Trifid
• Our Galaxy in Stars, Gas, and Dust

... 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) . ...

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• APOD Index - Nebulae: Emission Nebulae
• APOD Index - Nebulae: Reflection Nebulae
• APOD: 2012 October 26 - Reflection Nebula vdB1

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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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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• Brandon's Research
• Dust in Planetary Nebulae
• Determinations of Dust Scattering Properties from Dark Clouds

... Nebulae are clouds of gas and dust in space. ... These clouds come in many different varieties: some are the remains of dead stars, while others are areas of vigorous star birth, like this one. In fact, two different types can be seen in this striking new image: emission nebulae and reflection nebulae. ... The bluish patch next to the red emission nebula shows light from recently formed stars being scattered in other words, reflected in many different directions by these tiny particles. ...

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• Zooming in on a stellar nursery in Corona Australis | ESO
• Detailed view of the Prawn Nebula from ESO's VST | ESO
• ESO - Thesis Topic: Dust in the Crab Nebula Supernova Remnant

Astronotes Armagh Planetarium's Stellar Blog! ... Colin Johnston . ... This submillimetre-wavelength image of the region surrounding the reflection nebula M78 made with the Atacama Pathfinder Experiment (APEX) telescope (overlaid on a view of the same region in visible light) shows the position of interstellar dust grains (orange) to show where new stars are being formed.( ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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• Nebulae | Astronotes
• Hubble images the spectacular Lagoon Nebula | Astronotes
• Stellar Nursery NGC 6357: Image of the Month | Astronotes

... GSAOI Home . ... Science . ... Despite vast increase in our understanding of the evolutionary nature of planetary nebulae (PNe) during the last three decades, a central question remains: where is the missing mass? Theoretical evolutionary tracks predict that all stars with masses in the range 1.4-8 M Sun should become PNe. ... Clearly, much of the mass of the planetary nebula shell must remain un-ionized, and much of it may be in molecular form. ... The Magellanic Cloud PNe are ideal for this. ...

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• Publications
• Philip Lah's Research
• The Music of the Spheres

... B. Vicini, A. Natta, A. Marconi, L. Testi, D. Hollenbach, B.T. Draine . 1998, A&A, in press . ... 1998, ApJ, in press . ... L. Testi, F. Palla, A. Natta . ... Francesco Palla . 1998, The Physics of Star Formation and Early Stellar Evolution, eds. C.J. Lada and N. Kylafis, in press . ... 1998, in "The Molecular Astrophysics of Stars and Galaxies - A Volume Honouring Alexander Dalgarno", edited by T. W. Hartquist and D. A. Williams, Oxford University Press, in press . ... Star Formation Group . ...

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• APOD: 2000 April 24 - Reflection Nebula M78
• APOD: August 28, 1998 - Hydrogen Trifid

home publications > mercury . ... ASP Conference Series . ... Cover Story: The Nebula in Our Own Backyard . ... A giant torus of charged particles surrounding Jupiter gives astronomers a chance to study a nebula up close. by Duane H. Pontius, Jr., ... In this article, Duane Pontius traces the nebula's origin to Jupiter's volcanic moon Io. ... At the end of the article, Pontius explores how studying the Io plasma torus will help astronomers understand what's happening in more distant realms. home | ...

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• ASP: Lighting the Nebulae
• ASP: Editorial: Out of the Dark Blue
• ASP: Taking a Grand Virtual Voyage in the Milky Way

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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• ATNF SNR Publications: 1996 - 2000
• H Emission From Point Sources In The Magellanic Clouds
• Surface brightness measurements of extended galactic nebulae

... The latter will also help scientists construct a three-dimensional map of the nebula and should answer some questions about how it is interacting with the Pleiades cluster. Already Gibson and collaborators Kenneth Nordsieck of UW-Madison and Mark Holdaway of the National Radio Astronomy Observatory have added substantial evidence to the theory that the dust and gas the Pleiades nebula is composed of does not come from the famous cluster of stars that gives the nebula its name. ...

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• CGPS HISA Publications
• What is HISA?
• Gas and Dust in the Pleiades Reflection Nebula

... Shustov B.M., Wiebe D.S. Dust expelling from the Galaxy ( abstract from the journal ). Astronomy Reports , 1995, 39 , 578-586 [AZh, 72 , 650-659]. Wiebe D.S., Shematovich V.I., Shustov B.M. Chemical and dynamical evolution of protostellar clouds: initial stages of collapse ( abstract from the journal ). ... Shustov B.M., Wiebe D.S., Tutukov A.V. Evolution of disk galaxies and loss of heavy elements into the intracluster medium. ... ApJ (Letters), 1998, 503 , L71-L74 ( astro-ph/9806155 ). ...

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... Astrophysics Group . ... AMI Publications . ... AMI Consortium: Hurley-Walker N. et al., 2011, preprint (arXiv:1103.0947) . ... AMI Consortium: Olamaie M. et al., 2010, preprint (arXiv:1012.4996) . ... AMI Consortium: Shimwell T. W. et al., 2010, preprint (arXiv:1012.4441) . ... AMI Consortium: Davies et al., 2010, preprint (arXiv:1012.3659) . ... AMI Consortium: Franzen et al., 2010, preprint (arXiv:1012.3711) . ... AMI Consortium: Rodriguez-Gonzalvez C. et al., 2010, preprint (arXiv:1011.0325) . ...

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• Modelling absorption and emission of radiation by interstellar dust Bojan
• Modelling absorption and emission of radiation by interstellar dust
• Emily Curtis

Our publications in 1998 year Ugryumov, A. V.; Pustilnik, S. A.; Lipovetsky, V. A.; Izotov, Yu. ... Lipovetsky, V.; Engels, D.; Ugryumov, A.; Hopp, U.; Richter, C.; Izotov, Y.; Kniazev, A.; Popescu, C. New Horizons from Multi-Wavelength Sky Surveys, Proceedings of the 179th Symposium of the International Astronomical Union, held in Baltimore, USA August 26-30, 1996, Kluwer Academic Publishers, edited by Brian J. McLean, Daniel A. Golombek, Jeffrey J. E. Hayes, and Harry E. Payne, p. 299. ...

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• "Structure" publications in 2002 year
• "Structure" publications in 1996 year
• "Structure" publications in 1999 year

The neutral hydrogen in dust cloud . ... The intensity of line emission of neutral hydrogen (HI) is proportional to concentration of gas and is inverse proportional its temperature.Therefore the reduction of intensity emission of HI in dust clouds could not be interpeted simple. It has been observed the decreasing of HI line absorption at radiation frequencies and coordinates of the dense dust cloud which covered the most part of NGC 6618 nebula (figures 1 and 2). ...

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• Publications
• Publication Search
• Научные публикации лаборатории радиоспектроскопии САО РАН

... Most Important Journals . Less Popular Astronomical Journals . Physics . Space, Selectial mechanics, .. Russian Journals . ... Astrophysics & Astronomy . ... Astronomical Journal . ... New Astronomy . ... Publications of the Astronomical Society of the Pacific . ... STScI News . Space Telescope Insitute Newsletter . ... Journal of Astronomical Data . ... Journal of High-Energy Physics (mirror in CERN ) [astro, grav, hi-energy .. ... Journal of Experimental and Theoretical Physics . ...

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• Be/X-ray binaries and candidates
• Sergei Popov

Next: Public Understanding of Science, Up: Technical Research Summaries Previous: New Approaches to Risk . ... Michael Smith has been analysing new infrared data collected from 11 PPN and PN by Chris Davis (Joint Astronomy Centre, Hawaii) to search for clues as to how the objects evolve. ... Georgi Pavlovski studied the properties of supersonic turbulence in molecular clouds and its effect on the molecular cloud properties and their chemical evolution. ...

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• C. Refereed Journal Publications 2001
• C. Refereed Journal Publications 2002
• Armagh Observatory

... 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. ...

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... Telescopes . ... 1996: . A giant cloud of neutral hydrogen was detected resulting from the observations with the 6-m telescope and other world telescopes in a broad wavelength interval from UV to radio. ... Statistically significant deviations from the Poisson distribution are found in the radiosource distribution within the deep surveys conducted at RATAN-600 at the scales coinciding with those of the recently detected Sakharov oscillations (0.7-0.3 o ). ... Archive . ...

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• Galaxy sector, archive 2008
• New LBV Star Discovered in the Galaxy
• Metagalaxy sector, archive 1998

... 2006 . ... A.F.Kholtygin . ... Abstract . ... text in Russian . ... text in pdf (0.55Mb) . ... Kholtygin A.F., Shneiwais A.B. Stochastic Data in Astronomy: Fourier Analasis of Strongly Uneven Time Series , Astrophysics, 48 , 87-100 ( 2005 ) . ... Kholtygin A.F. UV lines in spectra of Planetary Nebulae (in russian) , Ultravililet Universe II , Proc. of the Conference, held in Instititute of Astronomy, May 19-20, 2006, Moscow, Eds: B.M.Shustov, M.E.Sachkov, E.A.Kilpio, M., Yanus-K, pp. ...

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• Alexei Kritsuk's Home Page
• Chemical evolution of galaxies: list of publications
• Astronomy Electronic Preprints and Publications