Astronomy Picture of the Day . ... 24.02.2009 . ... Credit Copyright: Drew Sullivan ( Ancient Starlight ) Explanation: Why is the Horsehead Nebula surrounded by a bubble? ... Glowing like an emission nebula, the origin of the bubble , known as Barnard's Loop , is currently unknown. ... February 2009 . ... NASA Web Site Statements, Warnings, and Disclaimers . ... Publications with keywords: Horsehead Nebula - emission nebula . Publications with words: Horsehead Nebula - emission nebula . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2009 February 24 . Barnard's Loop around the Horsehead Nebula . ... Although hard to make out, the famous Horsehead Nebula is the slight dark indentation in the bright streak just to the left of the image center. Glowing like an emission nebula , the origin of the bubble , known as Barnard's Loop , is currently unknown. ... About APOD | ...

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. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "That's as remote as the dark side of the Moon!" ... As the tired, hackneyed refrains went on, one in particular caught my ear: " Fly me away to the bright side of the moon, and meet me on the other side." ... As the Moon orbits the Earth, different parts of it get illuminated by the Sun. ... Bad Addendum : At the end of the album "Dark Side of the Moon" by Pink Floyd, there is a voiceover that actually says "There is no dark side of the moon. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . Planets . ... Monthly Sky Notes . ... February . ... The ringed planet will be quite bright, but unlike Jupiter it will not be the brightest point of light in the sky, this accolade will return to Sirius which is the brightest star in our night sky in the constellation of Canis Major. ... Seven days later on February 18, the Moon will be in its full Moon phase. ... Tweets that mention Wonders of the February Night Sky | ... Astronotes . ...

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. ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . Monograph Publications . IAU Publications . ... Publications of the ASP (PASP) . ... Astronomy Beat . ... Mercury Magazine Contents . ... January/February 2000 . ... A Partner-Approach to Astronomy Education: Project ASTRO the Tucson Way, Ginny Beal (with a brief history of the Project by Andrew Fraknoi) . ... Discover the International Astronomical Union, Johannes Andersen . ...

... STScI-PRC99-05a NICMOS PEERS THROUGH DUST TO REVEAL YOUNG STELLAR DISKS The following images were taken by NASA Hubble Space Telescope' Near-Infrared Camera s and Multi-Object Spectrometer. ... A thin , dark lane extends to the left and to righ t of th e binary, suggesting that a disk or ring o f dusty material encircles the two young stars. ... The young star itself appears as the bright red spot at the corner of the V-shaped nebula. ...

... 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) ...

Our publications in 2007 year Pustilnik, S. A.; Tepliakova, A. L.; Kniazev, A. Y.; Burenkov, A. N.; SAO; Russia; SAAO; Africa, South . eprint arXiv:0712.4205, submitted to Astrophysical Bulletin (SAO) (12/2007) . Pustilnik, S. A.; Tepliakova, A. L.; Kniazev, A. Y. eprint arXiv:0712.4007, submitted to Astron.Lett (12/2007) . ... Kniazev, A. Y.; Pustilnik, S. A.; Zucker, D. B. eprint arXiv:0707.4285, submitted to MNRAS (07/2007) . ... eprint arXiv:0707.4288 (07/2007) . ...

... Staff list | ... The European VLBI (Very Long Baseline Interferometry) Network (EVN, http://www.evlbi.org/ ) is a network of radio telescopes in Europe, Asia, North America and South Africa, which allows imaging at radio wavelengths with millarcsecond resolution (from 0.001'' to 0.1'') using the VLBI technique. ... VLBI continuum observations generally observe high brightness temperature radio emission from synchrotron or gyro-synchrotron processes with thermal emission detectable on short baselines...

... 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 . ...

... ACS STAN, 07 February 2008) . ... ACS+WFPC2 STAN, 07 February, 2008 . ... This ACS+WFPC2 STAN primarily covers topics related to the preparation of Cycle 15 Phase I proposals (the deadline is 27 January 2006) and 2-gyro observations. ... This ACS+WFPC2 STAN primarily covers topics pertinent to the preparation of Cycle 14 Phase II proposals (the deadline is 13 May 2005). ... This ACS+WFPC2 STAN covers topics pertinent to the preparation of Cycle 14 Phase I proposals (the deadline is 21 January 2005)....

... Lagoon Nebula, Trifid Nebula and the NGC 6559 Complex . The summer Milky Way brings with it the bright Messier nebulas of M8 (Lagoon) and M20 (Trifid) as well as the NGC 6559 Nebula Complex in Sagittarius. The Lagoon takes its name from the dark nebula that bisects the nebula. ... The NGC 6559 complex (upper left nebulosity) consists of the emission and reflection nebulas of IC1275, IC1274, IC4681 and IC4685. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Dr. Victoria I. Prokhorenko . ... Situation Analysis of The "PROGNOZ" Orbit for Solar- Terrestrial Space Experiments. ... Studies of Satellite Situations Mission. ... A Situation Analysis of the Orbits of the Tail and Auroral Probes in the "INTERBALL" Project. ... Specific Tasks of Multiple Scale Plasma Measurement in Regatta- Cluster System (co-authors S. Savin and L. Zelenyi)- In Book: Proceedings of an International Workshop on Space Plasma Physics Investigations by Cluster and Regatta. ...

... Home Observing This Month?s Sky This MonthтАЩs Sky тАУ February 2016 . ... This MonthтАЩs Sky тАУ April 2016 . This MonthтАЩs Sky тАУ March 2016 . This MonthтАЩs Sky тАУ February 2016 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... The space VLBI mission RadioAstron, led by the Astro Space Center (ASC) of Lebedev Physical Institute, . ... execution of a balanced scientific program for the Mission. The scientific program of the RadioAstron will consist of three major parts: the Early Science Program (ESP), . Key Science Program (KSP), and General Observing Time (GOT) projects. ... The KSP . ... a long-lasting scientific impact of the Mission. ... The RadioAstron Announcement of Opportunity - 1 and Final Notes ; . ...

Sky watchers will witness a total lunar eclipse in the early hours of Thursday 21st February, subject to weather conditions. For a total lunar eclipse to occur, the Moon in its orbit around the Earth must pass fully into the cone-shaped shadow of the Earth in space. ... The Moon does not usually go completely dark because the Earth's atmosphere refracts direct sunlight around the edge of the shadow on to the Moon's surface. This causes the Moon to turn a dark, blood-red or copper colour. ...

... 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 . ...

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 . ...