... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 July 6 . Bright Galaxy NGC 2903 . ... Explanation: Spiral galaxy NGC 2903 is only some 20 million light-years distant in the constellation Leo . ... In fact , NGC 2903 exhibits an exceptional rate of star formation activity near its center, also bright in radio, infrared , ultraviolet, and x-ray bands . ... About APOD | ...

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• APOD: 2013 May 23 - Messier 109
• APOD: 2015 August 10 - A Sagittarius Triplet
• APOD: 2012 June 1 - A Sagittarius Triplet

Astronomy Picture of the Day . ... Explanation: "Nebula at the right foot of Andromeda ... " begins the description for the 76th object in Charles Messier's 18th century Catalog of Nebulae and Star Clusters . In fact, M76 is one of the fainter objects on the Messier list and is also known by the popular name of the "Little Dumbbell Nebula". Like its brighter namesake M27 (the Dumbbell Nebula), M76 is recognized as a planetary nebula - a gaseous shroud cast off by a dying sunlike star . ...

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• Journal "Peremennye Zvezdy"
• XWare > APOD

... 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" . ...

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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. ...

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... August 7, 1998 . M65 Without Moth . ... Explanation: Messier 65 ( M65 ) is a bright spiral galaxy of stars only 35 million light-years away in the constellation Leo . ... The faint blue smudges along the spiral arms of M65 are large clusters of bright, newly formed stars within the distant galaxy while the bright individual stars are foreground objects in our own Milky Way galaxy . ... About APOD > . ...

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• APOD: October 18, 1999 - NGC 3603: An Active Star Cluster
• APOD: September 22, 1998 - M61: Virgo Spiral Galaxy
• APOD: 2000 August 18 - X-Rays From Antennae Galaxies

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

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• Charles Dana Discovery Center, Central Park ? Amateur Astronomers Association
• AAA Urban Starfest in Central Park ? Amateur Astronomers Association of New...
• Central Park ? Solar Observing ? Amateur Astronomers Association of New York

... Its perihelion would occur on April 1, 1997, at which point the comet would be only 0.92 astronomical units from the Sun, just within the orbit of Earth. ... Taken in April 1993, the photo showed the comet over 13 astronomical units from the Sun, well beyond the orbit of Saturn. ... Hale, as in Comet Hale-Bopp, has written a book, Everybody's Comet (available through the ASP Catalog) and coordinated an Internet project, "Hale-Bopp: Live in the American Classroom." ... Anatomy of a comet. ...

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• ASP: Star Science in the Autumn Sky
• ASP: Beacons in the Gloom
• ASP: Indiana Jones and the Astronomers of Yore

Definitions of Magnitudes and Surface Brightness 1 The magnitude system 1.1 Apparent magnitude Astronomers are stuck with the antiquated old system of magnitudes and so a clear explanation of what this system is and how it relates to more sensible units is important. ... 1.2 Absolute magnitude Absolute magnitude is a logarithmic luminosity scale. ... One usually goes by the round about process of referring to the absolute magnitude of the sun. ... Magnitudes and surface brightness 6/6 ...

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• C/2006 P1 (McNaught)

. True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . Images show regions used to extract spectra . Regions with red strikes are excluded . Background was subtracted from a region around or close to the SNR. Back to J0454.4-6713 Index . Chandra Supernova Remnant Catalog . Main Page | Galactic SNR | Magellanic Cloud SNR . True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR .

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• Chandra Images for G021.5-00.9
• Chandra Images for SNRJ 0540.1-6919
• Chandra Supernova Remnants Catalog - Instrumental Artifacts

UC Santa Cruz Press Release: Astronomers discover an enormous halo of red giant stars around Andromeda 4/1/08 10:54 PM January 7, 2007 Contact: Tim Stephens (831) 459-2495; stephens@ucsc.edu Astronomers discover an enormous halo of red giant stars around Andromeda Astronomers have found an enormous halo of stars bound to the Andromeda galaxy and extending far beyond the swirling disk seen in images of the famous galaxy, our nearest large galactic neighbor. ...

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• Local astronomers find gigantic halo around neighboring galaxy - By MEGHA
• Observing Faint Targets Near Bright Objects
• Surface Brightness Profiles

... Ignacio Ugarte Urra's PhD thesis topic is the investigation of coronal bright points. In his first paper (in collaboration with Gerry Doyle and Maria Madjarska) he investigated the formation, evolution and decay of a coronal bright point via a spectroscopic analysis of its transition region counterpart and the evolution of the underlying magnetic bipole during 3 days of almost continuous observations. ... In general the bright point has a radiance 4 times higher than that of the network. ...

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• Armagh Observatory
• M.D. Smith, Research Astronomer
• May 2002 Planetary Alignment

... Astronomers have used a new technique to see the faint light from a planet that is orbiting a distant star. ... Instead, astronomers found them by looking for telltale clues, such as how the light from a star dims when an exo-planet passes in front of it, or how it wobbles because of the pull of an exo-planet s gravity. Astronomers can learn a lot about exo-planets that move in front of their stars. This is because the starlight passes through the exo-planet s atmosphere on its way to Earth. ...

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• ESO - How can I run the pipeline when there are no bright objects in the
• Rivi: Be Stars
• ESO - My data shows an extended, bright feature - what can this be?

This composite image contains three distinct features: the bright star-filled central region of galaxy NGC 6946 in optical light (blue), the dense hydrogen tracing out the galaxy s sweeping spiral arms and galactic halo (orange), and the extremely diffuse and extended field of hydrogen engulfing NGC 6946 and its companions (red). ... D.J. Pisano (WVU)/B. Saxton (NRAO/AUI/NSF)/Palomar Observatory тАУ Space Telescope Science Institute 2nd Digital Sky Survey (Caltech)/Westerbork Synthesis Radio Telescope ...

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• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BE41289D5-D378-49BC-86EF-52EC1AC86894%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BBCEC086E-090A-4BC1-AB67-5122E277FB4A%7D
• http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B47744292-1AD9-4EAE-9EFF-D5CD682128F8%7D

November 2006 Astronotes 1 Candles in the Dark Image Credit: Wikipedia.org By Colin Johnston, Science Communicator Since the mid-ninteenth century astronomers have used the principle of parallax to measure the distance to other stars. ... How then can we tell, for example, that M31, the galaxy in Andromeda, is 2.2 million light years away? It would be straight-forward to tell how far away a star was if it was exactly the same brightness as our own Sun. ...

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• http://www.armaghplanet.com/pdf/AstroTopics/Beyond%20the%20Solar%20System/Guide%20to%20the%20galaxies.pdf
• Comet ISON: will it be Comet of the Century? | Astronotes
• Cepheids Inconstant Stars which break the rules | Astronotes

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

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• THE BRIGHT SUPERNOVA 1991T IN NGC 4527; AN AMATEURS PRESPECTIVE
• Bright Supernova - Archives
• Supernova 1987A in LMC

Old subtables of the extended ``HIPASS Bright Galaxy Catalog'' . ... Koribalski, Staveley-Smith, Kilborn, + HIPASS/ZOA teams 2004, AJ 128, 16 . The 1000 Brightest HIPASS Galaxies: HI Properties . ... The 1000 Brightest HIPASS Galaxies: The HI Mass Function . ... The 1000 Brightest HIPASS Galaxies: Newly Cataloged Galaxies . ... To download the gzipped ps-file click here . ... The Brightest Galaxies from HIPASS . Presented is the distribution of the 700 brightest HIPASS galaxies. ...

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• HIPASS Bright Galaxy Catalog

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . The Amateur Astronomers of Central Iowa is a small nonprofit amateur astronomy club located near Marshalltown in Central Iowa. ... Listed Since February 14, 1999 . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

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• Articles written by astronomers for astronomers of all ages.
• You Can Make Stellar Images Brighter - an Astronomy Net Article

... Flux density at 1 GHz (/Jy): 18 . ... Molonglo at 408 MHz (3'). ADS . Dickel & DeNoyer 1975, AJ, 80, 437. ... FIRST at 1.4 GHz (65''?48''). ... VLA at 1.4 GHz (12'': S=14 Jy) and 5 GHz, plus Einstein observations. ... VLA at 1.5 GHz (25'') and 1.4 GHz (7".8?7".5) and 5 GHz (25'') including polarisation, plus Ooty at 327 MHz (100''?31''), including review of flux densities. ... VLA at 327 MHz (3'.5?3'.6: S=42.5 Jy). ... Anderson & Rudnick 1993, ApJ, 408, 514. ... 2011, A&A, 536, A83. ...

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• G332.4-0.4
• G111.7-2.1
• G260.4-3.4

... 78Mingaliev+ J/A+A/370/78 RATAN-600 NCP bright radio sources (Mingaliev+, 2001) ================================================================================ Observations of the bright radio sources in the North Celestial Pole region at the RATAN-600 radio telescope. ... The flux densities of 171 sources in the Declination range +75deg +88deg are presented; typical flux density errors are 5-10 percent including calibration errors. ... Flux density at 2.3GHz 48- 52 F5.3 Jy e_S2.3GHz ? ...

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• RBSC-NVSS SAMPLE. I. RADIO AND OPTICAL IDENTIFICATIONS
• XID: Cross-Association of ROSAT/Bright Source Catalog
• HyperLEDA documentation: compilation of surface brightness (a105)