... M81: A Bulging Spiral Galaxy . ... Credit: NASA , UIT Explanation: Few stars are still forming in the old giant spiral galaxy M81. The blue regions in this picture - representing ultraviolet light - highlight regions of bright young stars and star formation and appear rare than in M74 and M33 . ... M81 is therefore classified as spiral galaxy type "Sab" on the Hubble Sequence of Galaxies . ... Bright Spiral Galaxy M81 from Hubble . Bright Spiral Galaxy M81 in Ultraviolet from Galex . ...

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• M81 and M82: GALEX Full Field
• Bright Galaxy NGC 2903
• Bright Stars, Dim Galaxy

... Tonight's Sky . ... Sky this Month . ... space physics . ... The Sky This Week: April 1 - 10 . ... Sky this Week . ... Sky Events . Get to Know the Night Sky . Tour the Deep Sky . Sky Guide . ... Observing springtime deep-sky objects with a large telescope . ... Johns Hopkins University Applied Physics Lab, Laurel, Maryland . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

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• Space: women neednт??t apply? | Astronomy.com
• galaxy evolution | Astronomy.com
• Hubble observes galaxies' evolution in slow motion | Astronomy.com

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2010 December 27 . One Million Galaxies . Credit: 2MASS , T. H. Jarrett , J. Carpenter, R. Hurt . ... Many galaxies are gravitationally bound together to form clusters , which themselves are loosely bound into superclusters , which in turn are sometimes seen to align over even larger scale structures . ... About APOD | ...

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• APOD: 2004 December 30 - M81 and M82: GALEX Full Field
• APOD: December 11, 1996 - Starburst Ring in Galaxy NGC 1317
• APOD: 2007 December 11 - The Universe Nearby

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . ... Parkes radio telescope webcam . ... I will show that interference among multiple spiral arms can cause the same galaxy to appear with different morphology, e.g., 2-armed, 3-armed, or 4-armed, changing within a dynamical time. ...

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• Structure and Evolution of Galaxies
• Astro Project: Structure and Evolution of Galaxies
• A new twist to polar rings

We present our analysis of UV attenuation by internal dust of a large sample (N=906 galaxies) of Lyman break galaxies (LBGs). Using spectral energy distributions (SEDs) from the PУ?GASE galaxy spectral evolution model, we apply dust attenuation corrections to the G-R colors, using the Witt Gordon models for radiative transfer in dusty galactic environments to arrive at the UV attenuation factors. ... ADS ] . ADS Citation Query . ... Copyright 2012 Karl D. Gordon All Rights Reserved ...

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• Starburst and Galaxy evolution
• Studying Proto-Planetary Nebulae
• Starburst and Galaxy Evolution Introduction

... Galaxy Evolution home . ... The origin and evolution of radio sources . Radio sources and their environments . ... We are investigating how this interaction effects galaxy evolution in general as well as the feedback effect of the radio source on its host galaxy and AGN. ... One direct observational manifestation of this interaction is the existence of extended regions of emission-line gas which show a clear spatial relationship to the radio source itself. ...

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• Galaxy Evolution: Cosmological evolution of star formation
• Galaxy Evolution: Regulation of the ISM and Star Formation
• Galaxy Evolution: Publications submitted

home education > activities . ... Quick math activity that asks students to calculate scale models of a binary star system with a black hole in it. [h] . ... Students use a radiometer and a light bulb with a dimmer switch to make connections between the temperature, color, and radiation output of a star. ... This demonstration, similar to the above, from the Exploratorium Snack-book of science activities, lets students demonstrate how molecules scatter light and change the colors of the beam. [m,h] . ...

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• ASP: Mercury Spring 2011
• ASP: Sharing the Universe
• ASP: Monster Comet Promises Big Show

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

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• Galaxy Gallery Page II
• Astro-2 and the UIT Experiment
• Evidence for Dark Matter

... October 16, 1995 . Starburst Galaxy M94 . Credit: NASA , Ultraviolet Imaging Telescope . Explanation: The spiral galaxy M94 is somewhat unusual in that it shows a great ring of bright young stars particularly apparent when observed in ultraviolet light , as shown above. Such a high abundance of these young blue stars may cause a galaxy to be designated a starburst galaxy. ... Tomorrow's picture: Galaxy Dwingeloo 1 Emerges . ... About APOD | ... NASA Technical Rep.: ...

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• APOD: December 18, 1999 - Irregular Galaxy Sextans A
• APOD: 2000 August 18 - X-Rays From Antennae Galaxies
• Atlas of Monte Carlo Models of Dust Extinction in Galaxies

... Previous: Substepping and its Application to HST Imaging . ... This is a preliminary report on an application of the co-addition technique based upon the Richardson-Lucy algorithm. The combination of high signal-to-noise ground-based images obtained with the ESO NTT using SUSI with high angular resolution HST FOC f/96 images gives new insights on the properties of galaxy cores and their potential time variability. Cores of galaxies are one of the main thrusts of present extragalactic research. ...

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• Demonstration of Parallel AIPS++ Deconvolution Application
• Positive Iterative Deconvolution in Comparison to Richardson-Lucy Like
• Clustering Analysis Algorithms and Their Applications to Digital POSS-II

... V.V.Makarov, V.P.Reshetnikov, V.A.Yakovleva . Photometric study of the peculiar galaxy NGC 2685" . ... eds.), Tallinn, 1989, p.19 . ... Press, 1994, p.272-273 . ... A.A.Mullari, V.V.Orlov, St.Petersburg Univ. ... conference, St.Petersburg, 1997, p.168-169 . ... All-Russian Astronomical Conference, Book of Abstracts, . ... in "Astronomy: traditions, present, future", V.V.Orlov, V.P.Reshetnikov, N.Ya.Sotnikova (eds.), St.Petersburg University Press, 2007, p.92-115 (in Russian) . ...