... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 November 23 . A 212-Hour Exposure of Orion . ... It is a direction in space that is rich with impressive nebulas. ... After 212 hours of camera time and an additional year of processing, the featured 1400-exposure collage spanning over 40 times the angular diameter of the Moon emerged. ... About APOD | ...

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• APOD: 2015 November 4 - The Great Orion Nebula M42
• APOD: 2015 November 16 - A Blazing Fireball between the Orion Nebula and Rigel
• APOD: 2012 November 26 - Wisps of the Veil Nebula

Astronomy Picture of the Day . Orion's Horsehead Nebula . ... 25.09.1995 . ... Because of its shape, it is known as the Horsehead Nebula . ... The horse head feature is dark because it is really a dense dust cloud which lies in front of the bright nebula and blocks the light. ... NASA Web Site Statements, Warnings, and Disclaimers . ... U. Based on Astronomy Picture Of the Day . Publications with keywords: Orion - Horsehead Nebula . Publications with words: Orion - Horsehead Nebula . ...

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• The Great Orion Nebula M42
• Southern Orion: From Belt to Witch
• Great Orion Nebulae

... 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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• M42 Color Images
• The Large Magellanic Cloud

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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• The hidden fires of the Flame Nebula* | ESO
• The hidden fires of the Flame Nebula (full frame) | ESO
• The Attic - Cosmic Riddle

New Moons of Uranus . Brent Gladman's Home Page . ... The discovery of two probable distant satellites of Uranus was reported by B. Gladman, P. Nicholson, J. Burns and J. Kavelaars. ... This discovery was reported in the IAU Circular 6764 . ... Discovery image of S/1997 U 2 . This shows the discovery image of brighter of the two new moons of Uranus. ... This shows the discovery image of faint new moons of Uranus. ... This shows another discovery image of faint new moons of Uranus. ... Uranus . ...

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• APOD: 2000 August 30 - The Brown Dwarfs of Orions Trapezium
• Titan Press Release
• APOD: October 9, 1997 - Hale Bopp and the North American Nebula

Astronotes Armagh Planetarium's Stellar Blog! ... Meteors and Meteorites . ... Stars . ... Monthly Sky Notes . ... This famous depiction of the Leonids was based on a first hand account of a meteor storm by a minister, Joseph Harvey Waggoner. ... In the autumn the Great Square of Pegasus is visible in the southern night sky. ... I hope this guide to the November night sky is helpful and have fun star sight-seeing! ... Tweets that mention The Leonid meteors: highlights of the November night sky | ...

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• Orion, mighty hunter of the winter sky | Astronotes
• September 2012 Night Sky Wonders | Astronotes
• Stellar Nursery NGC 6357: Image of the Month | Astronotes

... 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
• Leonids 2002
• Leonid Dust Trails

T he Siding Spring Survey (SSS) is a Near-Earth Object search program that utilises the 0.5-m Uppsala Schmidt Telescope at Siding Spring Observatory, N.S.W., Australia. ... The mission of the Siding Spring Survey is to contribute to the inventory of near-earth objects (NEOs), or more specifically, the potentially hazardous asteroids (PHAs) and comets (PHOs) that may pose a threat of impact and thus harm to civilization. ... Based on the CSS Mission page . ... Siding Spring Survey Main Page . ...

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• GSAOI Orion Nebula Cluster Science Page
• Orion Nebula
• Orion Nebula by the Hubble Space Telescope

... 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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• NASAт??s New Horizons spots Plutoт??s faintest known moons | Astronomy.com
• The right number of images | Astronomy.com
• Comet ISON shines in November's second week | Astronomy.com

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Facilities . ATNF facilities . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... ATCA . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

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• The Orion Nebula
• ATNF Media Release - November 5, 1998
• The Circinus Galaxy

... IDL library . ... Check out Craig Markwardt's DXDEBUG package for some command line debugging tools that will revolutionize the way you work. ... Get it here ctags is a powerful tool for software development which keeps track of which source file contains the definition for a given function. ... How often have you typed some long series of commands in to the IDL prompt interactively, decided you liked something, and then wanted to save all those commands into a pro file? ...

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• Right Ascension
• John H. Debes
• Brandon's Research

List of publications . ... Moscow University Press. 160 pp. ... Shevchenko V.V. A Lunar Base. Moscow. ... Shevchenko V.V., Chikmachev V.I. Lunar Base - a Project of XXI Century. ... Shevchenko V.V., Pugacheva S.G., Dehktereva K.I. Brightness Characteristics of the Infrared and Visible Radiation of the Lunar Surface. ... Problems of Complex Research of the Moon. ... Solar System Research. ... Baydal G.M., Sizentzev G.A., Sotnikov B.I., Shevchenko V.V. Lunar Base Infrastructure and Lunar Resources. ...

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• Vladislav V. Shevchenko
• Geophysical Research Abstracts
• Vadim I. Chikmachov

... --------------------------------------------------------------------------- UniversalТ? x Т? y Т? sin d Т? cos d Т? u Т? u Т? m Time Т? Т? Т? Т? Т? e Т? i Т? --------+---------+---------+---------+---------+---------+---------+--------- h m Т? Т? Т? Т? Т? Т? Т ... .35290 Т?+0.93566 Т?+0.54047 Т?-0.00588 Т? 250 48.1 40 Т?-1.06323 Т?-0.95120 Т?-0.35292 Т?+0.93565 Т?+0.54049 Т?-0.00586 Т? 253 18.0 50 Т?-0.96776 Т?-0.96093 Т?-0.35294 Т?+0.93564 Т?+0.54051 Т?-0.00584 Т? 255 ...

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• http://www.ipa.nw.ru/PAGE/EDITION/ENG/AE/e20121128lua.txt
• http://www.ipa.nw.ru/PAGE/EDITION/ENG/AE/e20031109lua.txt
• http://www.ipa.nw.ru/PAGE/EDITION/ENG/AE/e20021120lua.txt

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Bad TV
• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bitesize Tour of the Solar System

... Click here to go to index) . Ever since the launch of the first Sputnik in 1957, space exploration has advanced on two fronts, manned and unmanned . ... It includes: . The magnetosphere , the region dominated by the Earth's magnetic field. ... It includes a quick overview of the relevant physical sciences--magnetism, ions and electrons, plasmas etc.--and also includes tidbits of history, accessible by a "history button" at the ends of many sections. ... Electrons, Ions and Plasmas. ...

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• The Theorem of Pythagoras
• Formulas
• How to tell a sine from a cosine

Blackholes Forum Message . ... Post . ... My Mistake, Heres The Right Link . ... Post Message | ... I was referring to "The ulitmate death ray" link in my previous post, however the entire site is useful. ... www.astronomy.net . About 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" . ...

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• You Are Missing The Point - an Astronomy Net Exploration Forum Message
• Blackholes Discussion Forum - Hosted by The Astronomy Net
• Bigbang Discussion Forum - Hosted by The Astronomy Net

... Flux density at 1 GHz (/Jy): 160 . ... Radio: Limb-brightened to NE, with faint extension to the E. Optical: Brightest to the NE, with faint filaments outside the NE boundary. ... Fesen 1984, ApJ, 281, 658. ... ADS . ... 151 MHz observations (1'.2?3'.1) and Half-Mile Telescope at 1.4 GHz (2'.1?5'.4). ... Radio, IR, optical, UV and X-ray comparison, including VLA at 1.6 GHz (3".8?3".3 and 40''). ... 1988, ApJ, 335, 215. ... IR observations of shocked O 2 . ... Observations of shocked molecular...

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• G34.7-0.4
• G184.6-5.8

... Comet Tutorial . ... On July 1, 1993 an image was taken with the Hubble Space Telescope (HST) that clearly shows at least 15 individual fragments in one image frame of the train. ... This made an accurate orbit (or orbits) difficult to determine; however, after numerous observations of the comet, astronmers determined that the comet had passed within 96,000 kilometers (60,000 miles) of the center of Jupiter or 25,000 kilometers (16,000 miles) from the cloud tops during the July 8, 1992, approach. ...

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• Comet Introduction
• The Exploration of the Earth's Magnetosphere
• Jupiter's Moon Adrastea

... My mother had a 'star named for me' with the International Star Registry (henceforth ISR) as a gift for this Christmas. ... On the back of the chart, a sticker described the precise location and visual magnitude of the star, taken from the Hubble Guide Star Catalog. The first thing I noticed, was the chart was Epoch 1950. ... The coordinates were also exactly those on the ISR sticker, so I now knew that even though the ISR chart was epoch 1950, the coordinates on the sticker were epoch 1983. ...

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• Amateur Telescope Makers of Boston

. The measuring unit of the electrical impedance tomograph. The belt with electrodes for measurements on thorax . The EIT animation reconstructed from the data measured on the volunteer's thorax: . Right . Anterior . The animation represents one respiratory cycle, the cardiac pulsations are visible also. The static visualization is demonstrated: 1 - spinal column, 2 and 3 - right and left lungs, 4 - heart. The brightest colors correspond to highest conductivity .

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• EIT Gallery