... 2006 September 5 . Bright Cliffs Across Saturn's Moon Dione . Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA . Explanation: What causes the bright streaks on Dione? Recent images of this unusual moon by the robot Cassini spacecraft now orbiting Saturn are helping to crack the mystery. ... The bright ice-cliffs run across some of Dione 's many craters, indicating that the process that created them occurred later than the impacts that created those craters. ... About APOD | ...

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• APOD: 2001 July 3 - Unusual Flashes Toward Globular Cluster M22
• APOD: 2004 April 7 - Unusual Spiral Galaxy M66
• APOD: 2006 April 6 - Unusual Bright Soil on Mars

... 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.: ...

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• APOD: February 22, 1999 - NGC 1316: After Galaxies Collide
• APOD: March 15, 1998 - Unusual M82: The Cigar Galaxy
• APOD: February 9, 1999 - A Supernova Starfield

... Usually density waves of gas, dust, and newly formed stars circle a spiral galaxy 's center and create a nearly symmetric galaxy . ... Spiral galaxy M66, pictured above , spans about 100,000 light years , lies about 35 million light years distant, and is the largest galaxy in a group including M65 and NGC 3628 known as the Leo Triplet . Like many spiral galaxies, the long and intricate dust lanes of M66 are seen intertwined with the bright stars and nebulas that light up the spiral arms. ...

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• Астронет > Unusual Spiral Galaxy M66
• XWare > APOD

... Archives . ... Differential Emission Measure [Eqn] . ... Astro 301, class 1, and it took all of 20 minutes of talk about stellar magnitudes to put that notion to permanent rest. ... Now, it turns out that the human eye perceives brightness on a log scale, so magnitudes are numerically similar to log (brightness). ... frac{5}{2}\log_{10}\left(\frac{f_{object}}{f_{standard}}\right) \,,$$ . ... frac{5}{2}\log_{10}\left(\frac{L_{object}}{4 \pi d^2}\frac{1}{f_{standard}}\right) \,.$ ... Chandra Blog . ...

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• The AstroStat Slog Blog Archive model vs model
• The AstroStat Slog Blog Archive Eddington versus Malmquist
• The AstroStat Slog Blog Archive different views

Astronotes Armagh Planetarium's Stellar Blog! ... Colin Johnston . ... Our Galaxy . ... To locate it, look along the imaginary line between the two end stars on the leading edge of the PloughтАЩs blade (Merak and Dubhe) and Polaris (the North Star), the galaxy M82 (also known as the Cigar Galaxy) along with its companion M81, lies just off this line about a third of the way between the Plough and Polaris. ?а?аAs usual, the supernova is far brighter than its home galaxy, appearing as an extra star. ...

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• Digistar 4 Planetarium Projection System in Action | Astronotes
• Amazing multi-spectral view of Andromeda Galaxy | Astronotes
• Will a rogue star cause chaos in the Solar System? | Astronotes

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Three sixth-form students from St Patrick's Grammar School, Armagh , used the Faulkes Telescope South in Australia in April to observe and measure HW Virginis , an unusual "binary" or double star system suspected to host one or two extrasolar planets orbiting the central stellar pair. ... Armagh Observatory and associated researchers hope to develop this work to look for further evidence of planet-hosting binary star...

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• R CORONAE BOREALIS STARS
• Perseid Meteors
• Taurid Complex

The silicates that produce the 10 and 18 micron features appear to be broadly similar to terrestrial minerals such as Forsterite and Enstatite. ... Where pre-solar silicate dust grains can be isolated from meteorite material, these also tend to be Mg-rich silicates rather than Fe-rich silicates. ... It has been suggested that the interstellar silicate grains have a different 10 micron feature profile than what is observed for the silicates around evolved stars. ...

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• Unusually bright 12CO(3-2) condensations in the tidally perturbed Small
• Andy Fruchter's Homepage
• Observing Faint Targets Near Bright Objects

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,  Астероиды ,  Гамма-всплески ,  Любителям астрономии ,  Кометы   . ... Метки: Космический мусор ,  Астероиды ,  Любителям астрономии   . ... 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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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)
• Blue Straggler Stars

XMM-Newton Science Analysis System . ... A different approach is done via the setting withctisrcpos =Y: all event energy corrections do not use the actual RAWY coordinate but the corresponding RAWY location of the source ( SRCPOS ) as determined by the task epframes (either automatically or via setting withsrccoords =Y). ... The task epchain may be used with the setting ccds =4 withctisrcpos =Y to process only the CCD 4 where usually the bright source is located that causes the Out-of-Time events. ...

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• Comments
• General Comments

... Behemoth black hole found in an unlikely place . ... Spectacularly bright object in Andromeda caused by "normal" black hole . ... A spectacularly bright object recently spotted in one of the Milky Wayт??s neighboring galaxies is the result of a т??normalт?? stellar black hole, astronomers have found. ... Other scientists say ULXs are caused by material being dragged in by an intermediate-sized black hole formed from the merger of many stellar-mass black holes т?? about 1,000 times bigger than the...

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• Was Kepler's supernova unusually powerful? | Astronomy.com
• Astronomers watch delayed broadcast of a rare celestial eruption | Astronomy...
• Two very different gas clouds in the galaxy next door | Astronomy.com

image collection >> physical phenomena >> vortices . Image ers0205130118 . ... Cyclonic eddies on the front of the Soya Warm Current, La Perouse Strait. In the SAR image, the narrow bright band ~1 km wide is caused by current shift and starts near Kamen Opasnosti (Rock of Danger) where cold waters are located (see AVHRR image ). ... The third eddy also has the cold central area with SST equal to 5°C. The coldest waters (4°C) form a band to the southeast off the eddy's centre. ... Image . ...

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• SIMP > physical > river plumes > ers9507122149
• SIMP > physical > internal waves > env0604131916VV
• SIMP > physical > fronts > env0604131916VV

Watching the Detective Although a lot is happening during the seasons, the facts seem to fit together. ... From these facts, we should be able to figure out the cause of the seasons. ... Facts 4, 5, and 8 indicate that the seasons have something to do with the Sun. ... Although the angle varies by the same amount at every latitude (see figure 4 ), the effect of this variation on solar heating increases with latitude, a fact you can confirm with a little trigonometry (see Geometry of the Seasons ). ...

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• ASP: Astronomy in the News
• ASP: Light Pollution
• ASP: Steering by Different Stars? Astronomers and the Dark-Sky Movement

Astronomers usually measure the flux of an object by collecting light with a telescope, sending it through a known filter, and then determining the power. ... But astronomers usually give their photometric results in terms of magnitudes. ... Astronomers define an absolute magnitude that is independent of the distance of a star and only depends on the intrinsic properties of the object: the absolute magnitude is the magnitude the star would have if it were 10 parsecs away from the Earth. ...

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• Measuring aperture
• Sky problems
• Radio data

... 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: Mad Science
• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Bad TV

. Comment on J0238+1636 . Our data show that in June 1996 the source had an unusually low flux density with an angular size of 0.6". The source is usually highly variable, strong and extremely compact. However, Chen, Zhang & Sjouwerman (1999) also claim the source was resolved with EVN observations at 5 GHz about 8 months after our observation when the flux density was still unusually low. VLBApls home page . Last modified: 16 Oct 2000

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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 | ...

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• Articles written by astronomers for astronomers of all ages.
• You Can't Make Stellar Images Brighter - an Astronomy Net Article
• Inertia - What Causes It? - an Astronomy Net Blackholes2 Forum Message

... Be Stars . ... Stellar Winds . ... He had found the first emission line star. ... More emission line stars were found soon, and one had to make subclasses to keep some overview. Cas is a main sequence B-type star, and together with other such stars showing hydrogen emission it forms the class of "Be stars", where the "e" stands for emission. ... Struve further speculated that those stars would be surrounded by a disk, basically thrown off the stellar surface by the rapid rotation. ...

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• CCD artifacts
• Brightness "Dips" Caused by Two Transiting Exoplanets | ESO
• High Resolution HST Images of Pluto and Charon (ESO Press Release 09/94)

This page is devoted to information on Supernova 1998eg in UGC 12133 . ... Information on the original web pages for many of these images can be found on the Supernova links web page. My basic rule of thumb is that if I get more than 6 images of a specific Supernova I usually create a web page to index these images. ... Tom Boles images 10/19/98 . ... According to IAUC 7033, English amateur Tom Boles has discovered a supernova 1998eg in UGC 12133. ... 19.906 16.0C T. Boles (discovery image) Oct. ...

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• Supernova images - Best of
• Bright Supernova Bright Supernova
• Supernova 1999cw in MCG -01-02-001

... This is done from within the keyword handler work() which is activated by the keyword WORK= . ... h #include init.h #include finis.h #include userfio.h #include ggi.h /* * Keyword handler for QUIT= */ static void quit(ident id, char * key , int code, void *arg) { bool finished=toflog(FALSE); ( void )userflog( , 1, 2, key , ); if (tobool(finished)) finis_c(); } /* * Keyword handler for both NUMBER = and GETAL= */ static void number (ident id, char * ...

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• ATNF Media Release - December 1, 1998
• HIPASS Bright Galaxy Catalog
• lbaops:lbamay2006:v190c [ATNF VLBI Wiki]