... October 25, 1997 . Orion's Horsehead Nebula . ... Explanation: The Horsehead Nebula is one of the most famous nebulae on the sky. It is visible as the black indentation to the red emission nebula seen just to the right of center of the above photograph. ... The horse-head feature is dark because it is really an opaque dust cloud which lies in front of the bright red emission nebula . ... The emission nebula 's red color is caused by electrons recombining with protons to form hydrogen atoms. ...

Astronomy Picture of the Day . Orion's Horsehead Nebula . ... It is visible as the black indentation to the red emission nebula seen just to the right of center of the above photograph. ... The horse-head feature is dark because it is really an opaque dust cloud which lies in front of the bright red emission nebula. ... Publications with keywords: nebula - Orion - Horsehead Nebula . Publications with words: nebula - Orion - Horsehead Nebula . ... LDN 1622: Dark Nebula in Orion . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Nebulae . ... Space Flight . ... Posted on July 28, 2015 | No Comments Peer deep into the constellation Sagittarius and you will find a spectacular young star cluster and its associated stellar nursery. ... Continue Reading.. ... Posted on October 4, 2013 | ... Posted on April 12, 2013 | ... Posted on March 5, 2013 | ... Posted on February 20, 2013 | ... Posted on November 15, 2012 | ... Posted on October 3, 2012 | ... Posted on August 31, 2012 | ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ... The Secret Inner Life of the Orion Nebula . ...

... October 9, 1997 . Hale-Bopp and the North American Nebula . ... Explanation: Comet Hale-Bopp 's recent encounter with the inner Solar System allowed many breath-taking pictures. Above, Comet Hale-Bopp was photographed on March 8th in the constellation of Cygnus . ... The North American Nebula is about 1500 light years away, much farther than the comet, which was about 8 light minutes away. ... About APOD > . ...

Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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. ...

I was wondering what conditions should be met to have the "darkest" sky .. ... Upon the above publication of the Southern Galactic hemisphere, TunГ Tezel started seeking opportunities to create the Northern counterpart image. ... So, the initial quest of having the darkest possible sky have delivered us these two all-sky images of the two galactic hemispheres as seen from Planet Earth. Zoomable and 'full-screenable' fisheye view of the "darkest sky" Southern Galactic Hemisphere image. ...

... 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) ...

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 . ...

... Artist's concepts of two ATLAST designs . ... ATLAST: Characterizing Habitable Worlds (Postman et al. ... Science drivers and requirements for an Advanced Technology Large Aperture Space Telescope (ATLAST):Implications for technology development and synergies with other future facilities (Postman et al.) ... A 16-m ATLAST Mission Design (Lillie et al.) ... Conceptual Design for a 16-m Segmented UVOIR Space Telescope (Korechoff et al.) ... Science with an 8-m to 16-m ATLAS Telescope (Postman et al.) ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Publications of the ASP (PASP) . ... Astronomy Beat . ... Mercury Magazine Contents and Select Excerpts . ... September/October 2005 . ... As much a need for the science community as for the nation, the astronomy education and public outreach profession is [finally] coming into existence. ... Sky Events, Richard Talcott . September Sky Map | October Sky Map | ... education | ...

Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Orion . Forum List | ... Post Message | ... Posted by L Madia on October 15, 2003 17:24:24 UTC . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Aurora . ... Corona . Fireballs . ... Zodiacal Light . ... The first thing to do is get acquainted with what the night sky looks like. ... The National Schools Observatory web site has very good horizon views of the sky for the current night. ... If the object is moving slowly across the sky then it may be one of the larger satellites. ... Cloudbait Observatory - October 2002 . ... October 2003 Aurora at Armagh . ...

... Project page . ... Project workpage . Turbulence in the Multiphase Interstellar Medium . Project I | ... Project highlight | ... Towards simulating turbulence with adaptive meshes . ... A. Kritsuk, P. Padoan, M. Norman . ... A. Kritsuk M. Norman . ... A. Kritsuk, M. Norman, P. Padoan . astro-ph/0411626 | ... P. Padoan, A. Kritsuk, M. Norman, A. Nordlund . ... Introducing Enzo, an AMR Cosmology Application . B. O'Shea, G. Bryan, J. Bordner, M. Norman, T. Abel, R. Harkness, A. Kritsuk . ...

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

... 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 . ...

... NGC 1788 Fox Face Nebula & Lynds 1616 dark nebula - отражательная туманность Лисья мордочка и ее непрозрачная часть - темная туманность в созвездии Орион (Orion) .. ... Просмотр полной версии : NGC 1788 Fox Face Nebula & Lynds 1616 dark nebula - отражательная туманность Лисья мордочка и ее непрозрачная часть - темная туманность в созвездии Орион (Orion) .. ... Координаты отражательной туманности NGC 1788 Fox Face Nebula .: ... Как найти отражательную туманность NGC 1788 Fox Face Nebula? ...

Our publications in 2005 year S.A. Pustilnik (SAO), A.Y. Kniazev (ESO, SAO), A.G. Pramskij (SAO) . Astronomy and Astrophysics, Volume 443, Issue 1, November III 2005, pp.91-102 (11/2005) . ... Kniazev, Alexei Y.; Grebel, Eva K.; Pustilnik, Simon A.; Pramskij, A.G.; Zucker, D.B. The Astronomical Journal, Volume 130, Issue 4, pp. ... 10/2005) . Pustilnik, S. A. Astron. ... Kniazev, A.Y.; Pustilnik, S.A.; Grebel, E.K.; Lee, H.; Pramskij, A.G. VizieR On-line Data Catalog: J/ApJS/153/429. ...