... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 October 26 . Comet Holmes in Outburst . ... Explanation: Comet 17P/Holmes stunned comet watchers across planet Earth earlier this week. ... Recorded on that date, this view from Tehran, Iran highlights the comet's (enhanced and circled) dramatic new visibility in urban skies. ... About APOD | ... A service of: ASD at NASA / GSFC . ...

... the Hubble Heritage Team ( AURA / STScI / NASA ) Explanation: What causes Hubble's Variable Nebula to vary? ... Hubble's Variable Nebula is a reflection nebula made of gas and fine dust fanning out from the star R Monocerotis. ... A leading variability explanation for Hubble's Variable Nebula holds that dense knots of opaque dust pass close to R Mon and cast moving shadows onto the reflecting dust seen in the rest of the nebula. ... NGC 7129 and NGC 7142 . ... vdB 152: Reflection Nebula in Cepheus ....

... October 16, 1995 . Starburst Galaxy M94 . Credit: NASA , Ultraviolet Imaging Telescope . Explanation: The spiral galaxy M94 is somewhat unusual in that it shows a great ring of bright young stars particularly apparent when observed in ultraviolet light , as shown above. Such a high abundance of these young blue stars may cause a galaxy to be designated a starburst galaxy. ... Tomorrow's picture: Galaxy Dwingeloo 1 Emerges . ... About APOD | ... NASA Technical Rep.: ...

... Observing . ... Home Education Workshops at Adorama Astronomy Workshop: Observing Variable Stars from the City ? February 15, 2015 . ... 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 . ... Presented by€а Adorama €аFor the Amateur Astronomers Association of New York . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

... Armagh Planetarium . ... Universe . ... Posted on November 25, 2014 | ... Continue Reading.. Posted on October 30, 2014 | ... Posted on September 26, 2014 | ... Newer Entries . Hello, IтАЩm Colin, welcoming you to Astronotes, the PlanetariumтАЩs official blog. Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ... Subscribe to Astronotes . ... Copyright Armagh Planetarium 2014 All Rights Reserved. ...

... In order to disentangle the effects of different climate variables on tree-ring growth rates of different species, and to explore the possibility that more than one species could improve the accuracy of the reconstructions of climate using tree rings, a methodical study of trees in close proximity to the Armagh Observatory climate station was initiated together with Ana Maria Garc?a Su?rez, and continued as part of the latter's PhD thesis with John Butler and Professor Mike Baillie (QUB). ...

We present the results of an extensive observing campaign on the O7.5 III star xi Persei. The UV observations were obtained with the International Ultraviolet Explorer. xi Per was monitored continuously in October 1994 during 10 days at ultraviolet and visual wavelengths. The ground-based optical observations include magnetic field measurements, HЮБ and He I lambda 6678 spectra, and were partially covered by photometry and polarimetry. ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

Observational Stellar Astronomy . Articles | ... We are made of star stuff" . ... TEMPERATURE OF A STAR: . ... The temperature of a star can be found out easily by simple observations. ... STAR . ... SPECTRAL CLASS: . All the stars in this universe are divided in to spectral classes based on their spectral lines. ... The spectral class of a star and the temperature of a star are related. So the spectral class can be found for a star since we know its temperature. ... www.astronomy.net . ...

... Summary: PmWiki group header. ... Summary:variables that control the display of links in pages:) (:Audience: admins (advanced):) . ... When enabled, causes PmWiki to use relative urls for page links instead of absolute urls. ... This array lists the order in which PmWiki looks for the page that you most likely are attempting to link to. ... Defaults to <a class='wikilink' href='\$LinkUrl'>\$LinkText</a> . ... The default is to add a '?' after the link text with a link to the page edit/create form. ...

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 . ...

... 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) ...

OptInt PmWiki : Pm Wiki / Security Variables . ... Present only when the in-built AuthUser username/password functionality is used). ... A switch to control whether or not changing a page's attributes causes any existing passwords to be forgotten. ... If set to zero, then session passwords are never saved (although any AuthUser authentications are still remembered). ... For AuthUser with LDAP authentication, this specifies the password used for binding (in conjunction with $AuthLDAPBindDN above). ...

... Tonight's Sky . ... Search By Name Enter coordinates Use current location . ... Observing . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... How do astronomers use Cepheid variables to measure distances? ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

New GCVS Versions for Three Southern Constellations Peremennye Zvezdy (Variable Stars) 27, No. ... We are currently working on a version of the General Catalogue of Variable Stars (GCVS) revised taking into account the new data accumulated since the 4th GCVS edition. ... It will contain all stars of the 4th GCVS edition plus a complete catalogue of the stars added to the GCVS in the Name Lists of Variable Stars Nos. ...

Welcome to Sergei Shugarov Home Page . Cataclysmic Variables Investigator . ... Cataclysmic Variable Star Home-page: http://cataclysm.sai.msu.ru) . ... Ikeya-Zhang Comet ephemeris, 2001-2003 . ... The Astronomical Conferences: . ... 31 March - 3 April 2004. ... 2004 . ... 2003 Conference in Gettingen, August 2001 . ... Conference on Variables Star, Odessa, August 2001 . Russian Astronomical Conference, August, 2001 Saint-Peterburg . Conference of Nova Star, Spain, Sitges, 20-24 May, 2002 . ...

... Fractional flux density variations of between 5 and 100 per cent (typically 15-25 per cent) have been detected on a range of time-scales from 1 to 12 years. ... The 151-MHz flux densities have been indirectly scaled to the 6C flux scale. ... Amongst the 72 sources for which the chance of being a true variable is greater than 0.8, typical maximum flux density variations of 15-25 per cent are seen; eight objects show variations greater than 50 per cent, with one source varying by more than 100 per...

... fran?ais . ... The cloud of pale gas surrounds a huge Red Giant star that has five times the mass of our Sun! ... The nebula was named by two British astronomers. ... Although the star at the heart of the nebula is millions of years younger than our Sun, it's already in a much later stage of its life. ... Our Sun is 4.6 billion years old and it's only just hitting middle age, whereas this star will live to be just a few million years old because it has much more mass. ...

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...