... Credit Copyright: Rudi Dobesberger ( Sternfreunde Steyr ) Explanation: An unusual triangle of light is visible this time of year just before dawn, in the northern hemisphere. Once considered a false dawn , this triangle of light is actually zodiacal light , light reflected from interplanetary dust particles . The bright reflecting triangle is clearly visible on the right of the above horizontally-compressed image taken just after sunset from Namibia in the southern hemisphere in 2009 June. ...

... 2010 September 13 . Zodiacal Light Over Namibia . ... Once considered a false dawn , this triangle of light is actually zodiacal light , light reflected from interplanetary dust particles . ... Zodiacal light is so bright in the north this time of year because the dust band is oriented nearly vertical at sunrise, so that the thick air near the horizon does not block out relatively bright reflecting dust. ... 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. ...

... 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....

... R. Cesaroni, F. Massi, C. Arcidiacono, M.T. Beltr\'an, D. McCarthy, C. Kulesa, K. Boutsia, D. Paris, F. Quir\'os-Pacheco, M. Xompero . 2012, A , in press . Different evolutionary stages in massive star formation . A. Sanchez-Monge, M.T. Beltran, R. Cesaroni, F. Fontani, J. Brand, S. Molinari, L. Testi, M. Burton . ... Massive star-formation toward G28.87+0.07 (IRAS18411-0338) investigated by means of maser kinematics and radio to infrared, continuum observations . ... 2012, ApJ, in press . ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . Monograph Publications . ... Publications of the ASP (PASP) . ... Mercury Magazine Contents . ... September/October 1997 . ... Instructors fret that no textbook is quite right, authors and publishers get shot down when they try to innovate, students count the days 'til they can sell back their unfriendly tomes. ... Astronomers have begun to rethink graduate education, and none too soon. ...

Amy Kimball . Publications . Radio Catalog . ... High Radio Frequency Sample of Bright Planetary Nebulae in the Southern Hemisphere Detected in the AT20G Survey (2015) MNRAS , 451, 3228 . ... Active Galactic Nucleus and Starburst Radio Emission from Optically Selected Quasi-Stellar Objects (2013) ApJ , 768, 37 . ... Kimball et al. ... A Closer View of the Radio-FIR Correlation: Disentangling the Contributions of Star Formation and Active Galactic Nucleus Activity (2010) ApJ , 24, 779 . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Armagh Observatory reports that, if skies are clear on the night of 27/28 September, skywatchers will witness a rare total eclipse of the Moon during the early hours of Monday 28th. ... As the eclipse progresses from penumbral to partial phase, and then towards totality, it is interesting to observe how the dark shadow of the Earth slowly encroaches on the Full Moon until the Moon is nearly completely obscured. ...

... The target list of 127 NLTT stars was selected using preliminary colour-magnitude selection criteria, which result in the inclusion of stars up to 30-40 parsecs from the Sun. Of the 127 targets, 28 are known late-type dwarfs and 29 have suspect 2MASS magnitudes (bright star diffraction spikes, unresolved companions etc.) ... Figure B2.1: Calibrating relations for computing spectral type from VO and TiO5 indices. ... Figure B2.3: Abundance calibration for M dwarfs. ... NStars proper motions index . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Milky Way . ... Monthly Sky Notes . ... September . ... By admin August 31, 2012 Posted in: Monthly Sky Notes , September . ... September is still a great time for gazing upon our home galaxy, the Milky Way and with the longer darker skies we may be able to see more clearly the celestial jewels hidden within it.€а Our first mission is to find the Milky Way galaxy and nicely it is running right over our heads at this time of the year. ...

... 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) ...

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. ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

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 | ...

Check out the new images (Jan 18-25) and (Jan 26-Feb 05) of the comet by Rob McNaught. ... Every few years a comet becomes bright enough to be easily seen with the naked eye but only every decade or so are these comparable with comets like Halley. ... Before Jan 13, the comet is not visible in the Australian sky after sunset. ... SOHO images . ... On Jan 12 at approximately 09:00 UT (8pm NSW time), comet C/2006 P1 McNaught appears at the 11 o'clock position in the images. ... STEREO images . ...

... The Russian TESIS/ CORONAS-PHOTON Solar Observatory, which has been working in orbit since January 30th, 2009, has photographed one of the most important events in the build up to the upcoming solar cycle - the formation of our star's new southern belt of activity. The first magnetic fields of the new cycle in the southern hemisphere appeared on the Sun's surface on May 23-24th. ... The belt of activity is one of the primary concepts, characterizing the solar cycle. ...

Supernova 2000db in NGC 3949 . This page is devoted to information on Supernova 2000db in NGC 3949 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 Supernova links web page. ... We have a DSS Photometry reference image made by Odd Trondal. ... Masakatsu Aoki image . ... Bernd Brinkmann image . ... Rafael Ferrando image . ... 2001/01/13.095 . ...

The CDK20 North is seen in November 2012 with its new A200HR mount, Apogee 16M camera, and Optec IFW-3 filter wheel. The Sirius dome of the CDK20 North is seen in May 2010, and the telescope is visible through the open shutter. ... Brad Carter (left) and Rhodes Hart (right) of the University of Southern Queensland visited their northern Shared Skies CDK20 at Moore Observatory in September 2009. ... Microswitches were added to limit the range of polar axis rotation on the original mounting. ...

... Visible and Infrared Survey Telescope for Astronomy: Progress Report" . ... The VISTA Project: a review of its progress and lessons learned developing the current programme , McPherson, Emerson, Born & Sutherland, in Ground-based Telescopes, eds Oschmann & Tarenghi, Proc of SPIE, 5489, 638, 2004 . Visible and Infrared Survey Telescope for Astronomy: overview Emerson and Sutherland, in Survey and Other Telescope technologies and Discoveries, eds Tyson & Wolff, Proc of SPIE, 4836, 35, 2003 . ...

... 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 . ...