... Molecular Cloud Barnard 68 . ... What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud . ... One of the most notable of these dark absorption nebulae is a cloud toward the constellation Ophiuchus known as Barnard 68 , pictured above . ... It is not known exactly how molecular clouds like Barnard 68 form, but it is known that these clouds are themselves likely places for new stars to form . ... NASA Official: Jay Norris. ... Coreshine from a Dark Cloud . ...

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... 2003 February 2 . Molecular Cloud Barnard 68 . ... Explanation: Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud . ... One of the most notable of these dark absorption nebulae is a cloud toward the constellation Ophiuchus known as Barnard 68, pictured above . ... It is not known exactly how molecular clouds like Barnard 68 form, but it is known that these clouds are themselves likely places for new stars to form . ...

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• APOD: 2006 February 15 - Rotating Titan in Infrared Light
• APOD Index - Nebulae: Dark Nebulae
• APOD: 2012 January 29 - Molecular Cloud Barnard 68

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. ...

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• Millimetre-range and visible-light views of a star-forming filament in Taurus |
• The Very Large Telescope Project

... To shed new light on these mysteries, we combine the gravitational lensing power of 25 massive galaxy clusters with HST's enhanced panchromatic imaging capabilities (WFC3 and the restored ACS) to test structure formation models with unprecedented precision. We have dubbed our program CLASH, which stands for: . ... CLASH: An Innovative Survey to Place New Constraints on the Fundamental Components of the Cosmos using the Hubble Space Telescope . ...

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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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• Diffuse Galactic Light in the Large Magellanic Cloud
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Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Earth Satellites . ... Portrait of M8: This is the region of the nebula nicknamed the the т??Southern Cliffт?? and beyond it we can see the darkness of interstellar space interrupted by stars. Image credit: Julia I. Arias and Rodolfo H. BarbУЕ Departamento de FУ-sica, Universidad de La Serena (Chile), and ICATE-CONICET (Argentina)) . ... Astronotes . ... Subscribe to Astronotes . ...

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• Stellar Nursery NGC 6357: Image of the Month | Astronotes
• Nebulae | Astronotes
• Young Stars in the Small Magellanic Cloud | Astronotes

... In one situation, we can use light from quasars to probe the material between us and them because that light may pass through one or more galaxies or gas clouds on its way to us. The gas inside the galaxies or the intergalactic clouds acts then as a filter, absorbing selected wavelengths from the quasar light. ... Light from a quasar must pass through clouds of gas and even faint galaxies -- each leaving its imprint on the light -- before we receive it here on Earth. ... Gravitational lensing . ...

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• ASP: Counterpoint: Where Is the Best Place to View a Solar Eclipse?
• ASP: Seeing Our Place in the Solar System
• ASP: Taking a Grand Virtual Voyage in the Milky Way

Thought-Provoking Imagery Shows Sun's Place in the Galaxy . ... SOHO - Explosive Coronal Mass Ejections from the Sun . SOHO-6 Comet at 2-6 solar radii from the Sun . ... The remarkable images come from SOHO's visible-light coronagraph, LASCO, which is able to mask the intense rays from the Sun's surface in order to reveal the much fainter glow of the solar atmosphere, or corona. ... SOHO is ideally placed to report and even anticipate their origins in the Sun's atmosphere. ... The Sun . ...

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• Next VLT Instrument Ready for the Astronomers (PR Photos 05a-c/00)
• FEBRUARY 26th 1998 SOLAR ECLIPSE FROM VENEZUELA
• APOD: June 21, 1999 - The Galactic Center in Infrared

... 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....

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• APEX turns its eye to dark clouds in Taurus | Astronomy.com
• A dark patch in Orion star formation | Astronomy.com
• How do light pollution filters work? Do they actually help? | Astronomy.com

LIF Marseille and Institute for Information Transmission Problems, Moscow, Russia. E-mail: alexander.shen AT lif.univ-mrs.fr, sasha.shen AT gmail.com . ... Kolmogorov complexity, algorithmic information theory . Teaching (mathematics, computer science): Independent University of Moscow, Moscow State University, Moscow mathematical school No 57. ... Kolmogorov memorial conference, Moscow. IEEE Conference on Computational Complexity, Aarhus (Denmark), ("Kolmogorov day") . ...

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• Labo J.-V.Poncelet: A.Sossinski
• Labo J.-V.Poncelet: N.Vereshchagin
• Labo J.-V.Poncelet: A.Glutsuk

... 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 . ...

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• Armagh Observatory
• Hale-Bopp Finding Chart 1
• Stars Beyond Maturity

... About meteorites . ... Meteorite Encyclopedia . ... About laboratory . ... On the night of September 24-25, in the north of Irkutsk Oblast, local residents saw a brightly glowing space object draw a line across the sky and fall into the taiga. ... But scientists learned of the heavenly visitor only on October 3, when a fax arrived at the Institute of Sun And Earth Physics from Bodaibo. ... The first thing we did was to interview residents of villages located along the meteor's flight path. ...

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... X-rays are made up of photons that are emitted from stars, or quasars, or supernovae, the sun, or simply: anything that is undergoing a change either in size or temperature or giving out heat. ... in an X-ray binary star system, in which one normal star's orbit is crossed by a neutron star, when the neutron star by means of gravitational pull takes matter from the normal star X-rays form. ... Artists conception of a normal star (HDE 226868) and a black hole taking matter from the normal star. ...

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• The AstroStat Slog light curve
• Fixing and Freeing Region Markers
• The AstroStat Slog light curves

ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Australia Telescope Online Archive (ATOA) . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• Australia Telescope National Facility
• Research - The high-velocity clouds of M31
• Introduction

... Subject and Problems of Stellar Astronomy. ... Plane of Galaxy, Methods of Its Location Determination. ... Stars Distances. ... Other Methods of Stars Distances Determination. ... Tangential Velocities, Their Determination by Self-Motions. ... Determination of Solar Apex and Spatial Velocity by Radial and Spatial Velocities of Stars. ... Features of Orientation and Parameters of Peculiar Stellar Velocities Ellipsoid. ... General and Selective Light Absorption in Galaxy. ... Darc Clouds in Galaxy. ...

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• Algorithm for apparent place computations.
• Mean places of star explanation page of Computer Ephemeris (DE200/LE200).
• Explanation to the mean places of polar stars.

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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• Plate Tectonics
• Our Place in the Cosmos

... SSAU History . SSAU roadmap . ... European Chamber of Science and Industry has published a rating of higher education institutions Academic Ranking of World Universities-European Standard ARES-2014. ... SSAU took the 29th place among the top 100 Russian universities. ... It is to be recalled that SSAU included among the 15 leading Russian universities that received government support to improve competitiveness and promote the top 100 international rankings. ... e-mail: ssau@ssau.ru . ...

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• Summer School on engine building took place in SSAU
• An extended meeting of SSAU Academic Council took place
• Summer School of Innovation Management took place in SSAU

... 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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• The High-Z SN Search Description
• Steel supports being placed under the main beams of the library floor.
• Placing the mirror

... Telescopes . ... On February 4, 2016, the Jubilee conference dedicated to the 40th anniversary of the first observations on the 6-m BTA telescope took place at SAO RAS. ... Afterwards, Igor D.Karachentsev shared his memories of the first observations at the BTA. ... One of the first SAO RAS astronomers Eugene L.Chentsov outlined the first steps of stellar spectroscopy at BTA and Vladimir E.Panchuk in detail described the instruments and stellar spectroscopy technique at the 6-m telescope. ...

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• Electronic version of Russian Bulletin
• Metagalaxy sector, archive 2009
• Metagalaxy sector, archive 2002

... Of course, the scope of chaos is vast, and we do not dare to cover it all. ... He will highly appreciate your help in compiling the list of URLs to such scientific groups and institutions. http://www.cplire.ru/win/InformChaosLab/ - InformChaos Lab (Moscow) . http://chaos.ssu.runnet.ru/ - Laboratory of Nonlinear Dynamics at Saratov State University (Saratov) . ... http://optics.npi.msu.su/sci/chaos.html - Chaos in laser systems . ... http://www.chaotic.com - Randle, Inc. ... Time: 2-6 July, 2001 . ...

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• SETI League Guest Editorial -- Past - Present - Future
• EIT Gallery