... NGC 2244: A Star Cluster in the Rosette Nebula . ... High energy light from the bright young stars of NGC 2244 ionizes the surrounding hydrogen gas clouds to create the red emission nebula appearance. ... Publications with keywords: star cluster - Rosette Nebula - emission nebula - open cluster - NGC 2244 . Publications with words: star cluster - Rosette Nebula - emission nebula - open cluster - NGC 2244 . ... Emission Nebula IC 1396 . ... M45: The Pleiades Star Cluster . ...

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• Астронет > NGC 2244: A Star Cluster in the Rosette Nebula
• In the Center of the Rosette Nebula
• IC 410 and NGC 1893

... 2002 March 17 . NGC 2244: A Star Cluster in the Rosette Nebula . ... Explanation: In the heart of the Rosette Nebula lies a bright open cluster of stars that lights up the nebula. The stars of NGC 2244 formed from the surrounding gas only four million years ago and emit light and wind that define the nebula's appearance today. High energy light from the bright young stars of NGC 2244 ionizes the surrounding hydrogen gas clouds to create the red emission nebula appearance. ... About APOD | ...

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• APOD: 2000 August 22 - NGC 2244: A Star Cluster in the Rosette Nebula
• APOD Index - Stars: Open Clusters
• APOD Index - Nebulae: Emission Nebulae

... May 22, 1996 . Star Cluster in the Rosette Nebula . ... Explanation: Embedded in the center of the colorful and photogenic Rosette Nebula is a bright, young open cluster . The bright blue stars in this cluster, labelled NGC 2244, emit ultraviolet light that knocks electrons away from hydrogen atoms . ... The Rosette Nebula is thousands of light years distant, but light would take only about 100 years to cross it. ... Tomorrow's picture: The Violent Star Cluster 30 Doradus . ... About APOD | ...

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• Arcetri Star-Formation Group Publications
• APOD: 2000 August 4 - M15: Dense Globular Star Cluster
• APOD: 2000 January 11 - The Rosette Nebula in Hydrogen, Oxygen, and Sulfur

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: Bright-Lights, Big-City, Overcast Survival Guide
• ASP: By the Light of the Moon
• ASP: Lighting the Nebulae

... Armagh Planetarium . ... Universe . ... Posted on October 1, 2010 | ... Before the modern era of technological astronomy, to know anything [ ] . Continue Reading.. ... 2 Comments In, say 1975, there was only one kind of ?stuff? in the Universe, matter made of protons and neutrons. ... Newer Entries . Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

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• HST | Astronotes - Part 4
• Our Galaxy | Astronotes - Part 5
• NGC4666: Secrets of a Starburst Galaxy | Astronotes

... Tadpole Emission Nebula and the Flaming Star Nebula . The constellation of Auriga harbors the cluster NGC 1893 which contains the Tadpole Nebula (IC 410). ... The Flaming Star Nebula, IC 405, is the magenta/purplish area and is the reflection portion of this nebulous region. 5nm Narrowband filters; H-alpha: O-III: S-II - 60: 60: 40 minutes x 600-second sub frames, Total= 2-hours 40-minutes, binned 1x1. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... The Pleiades star cluster, also known as the Seven Sisters and Messier 45, is a conspicuous object in the night sky with a prominent place in ancient mythology . ... The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years ) away. ... Data for these stars are listed in a table below. ... Yes . ... WEBDA Pleiades cluster data . ... M45: The Pleiades Star Cluster (2007 November 18) ...

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• AAS 1996 January Meeting Photo Release Images

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

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• Phil Plait's Bad Astronomy: Bitesize Astronomy

... In most situations, light helps us to see. But when it comes to looking at the night sky, light actually blocks our vision. ... You should be able to see around 2,500 stars with your naked eyes, but if you live in a big city or town, you probably see less than 10 stars on a normal night! This amazing space picture shows the shining star clusters and swirls of colourful gases of the Carina Nebula: an enormous expanse of gas, dust and stars lying deep in the heart of the Milky Way. ...

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• The Very Large Telescope Project
• The Brightness of the Night Sky
• The hidden fires of the Flame Nebula* | ESO

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. ...

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• Blue Straggler Stars
• GSAOI Orion Nebula Cluster Science Page
• Julie Banfield | Astronomer

... Embedded within this view are 2,753 star clusters. The view is 61,600 light-years across and contains images of 117 million stars in the galaxy's disk. Bottom-Left] An enlargement of the boxed field in the top image reveals myriad stars and numerous open star clusters as bright blue knots. Hubble's bird's-eye view of M31 allowed astronomers to conduct a larger-than-ever sampling of star clusters that are all at the same distance from Earth, 2.5 million light-years. ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B5A7C982A-3ED2-4E91-A6CA-27FE3029C0B0%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B203AE416-3031-4F3F-AAE0-3D91BC66084E%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7AAC2165-B2F3-4448-BCE8-F2C6CBA78534%7D

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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• Low Surface Brightness Galaxy Gallery
• Astronomy HyperText Book: Stellar Clusters
• galaxies, Hubble sequence

... a spiral galaxy some million light years away, made by combining images . ... 1st February using the Armagh Robotic Telescope at the Armagh Observatory. ... Image credit: Simon Jeffery. Astronomers Simon Jeffery and Jack Wright have obtained their first images of deep-space objects using a new тАЬroboticтАЭ telescope at Armagh Observatory. ... Simon Jeffery, project scientist for the new telescope, said: "After two years of hard work, it is very satisfying to see the first images looking so good. ...

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• Objects in the Sky
• Refereed Journal Publications 1999
• Light Pollution at Armagh Observatory

... To appear in: the proceedings of IAU Colloquium 171: The Low Surface Brightness Universe , held 5-10 July 1998 in Cardiff (United Kingdom) . ... PostScript: prep1297.ps (179Kb) . ... Space Telescope Science Institute, 3700 San Martin Drive,Baltimore, MD 21218, USA . ... huizinga@stsci.edu . Last updated, November 11, 1998 . ...

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• Roelof's Publications
• Target Category and Target Description [Description]
• Astronomy Magazine, July 1998

Galactic Wind Shells and High Redshift Radio Galaxies . ... M.Krause . Astronomy & Astrophysics, v.436, 845-851 . Very Light Jets II: Bipolar large scale simulations in King atmospheres [small version] . ... Simulations of Astrophysical Jets in Dense Environments . M.Krause, V.Gaibler & M.Camenzind . in: High Performance Computing in Science and Engeneering '05 eds.: E.Krause, W.J ger & M.Resch. ... M.Krause & M.Camenzind . ... Martin Krause & Paul Alexander . ... Martin Krause . ...

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• Astrophysics Group AMI Publications
• Astrophysics Group AMI Science
• Martin Krause - Large Scale Very Light Jet Simulation

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Australia Telescope Compact Array . ... Observations taken with the Australia Telescope Compact Array for the giant radio galaxy B0114-476 reveal a "double-double" structure with two outer diffuse lobes and two inner jet-like features. ...

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• Evolutionary Paths in Galaxy Morphology
• ATNF Daily Astronomy Picture
• X-Ray Microlensing of Bright Quasars

... D. J. Burke and J. Patrick Henry . The Astrophysical Journal, submitted. ... S. Brough, W. J. Couch, C. A. Collins, T. Jarrett, D. J. Burke , R. G. Mann . ... D. A. Wake, C. A. Collins, R. C. Nichol, L. R. Jones, D. J. Burke . ... R. Sadat, A. Blanchard, S. C. Vauclair, D. H. Lumb, J. Bartlett, A. K. Romer, J.-P. Bernard, M. Boer, P. Marty, J. Nevalainen, D. J. Burke , C. A. Collins, R. C. Nichol, . ... S. Majerowicz, D. M. Neumann, A. K. Romer, R. C. Nichol, D. J. Burke , C. A. Collins . ...

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• dictionary
• The AstroStat Slog light curve
• The galaxy M100

You Can Make Stellar Images Brighter . Articles | ... A few months ago I wrote an article titled "You Can?t Make Them Brighter". So why am I now writing that you can make them brighter. ... The image of a focused star is actually a small disk called the Airy disk, named after the 19 th century scientist Sir George Airy. ... For a given aperture, a smaller Airy disk means that the light is focused to a smaller disk and is therefore brighter. ... www.astronomy.net . About Astronomy Net | ...

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• The Astronomy Shop - Books - by Astronomy Net
• Astronomy Terms - To Help You Study The Universe - an Astronomy Net Article
• The Astronomy Shop - Posters - by Astronomy Net

... Telescopes · Binoculars · Microscopes . Meade Ultra-High Transmission coatings (UHTC ) Group . ... Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. ... These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models. ...

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• Meade Series 4000 Broadband Nebular Filters

http://hubblesite.org/newscenter/archive/releases/1996/22/text/ Probing the mysterious heart of the Crab Nebula, the tattered remains of a stellar cataclysm witnessed more than 900 years ago, astronomers using NASA's Hubble Space Telescope have found that the Crab is even more dynamic than previously understood, based on a cosmic "movie" assembled from a series of Hubble observations. ... Because of this flickering, the neutron star is also called a "pulsar." ...

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• University of Louisville Wide Field and Planetary Telescopes