Recent Submissions: 2010 August 12-15
Posted: Wed Aug 11, 2010 6:51 pm
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Please click on each image for best viewing; please click on the link below the
image title for more information about the image. Thank you!
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<- Previous submissions
Encore: Double Rainbow of Utah
Copyright: Niel Skousen
[attachment=6]IMG_0255.JPG[/attachment][/i]
Iris Nebula and Open Cluster NGC 7023
http://www.starrywonders.com/irisst8300.html
Copyright: Steve Cannistra Perseid over St. Andrew Church, Taliándörögd, Hungary
http://ladanyi.csillagaszat.hu/
Copyright: Tamas Ladanyi
[attachment=5]perseid_100808_ladanyi_v1.jpg[/attachment][/i]
Centaurus A and Omega Centauri
http://www.astrosurf.com/lorenzi/ccd/aw_centauri.htm
Copyright: Marco Lorenzi Perseid Meteor and Ancient Bristlecone Pine
http://www.tonyrowell.com
Copyright: Tony Rowell
[attachment=0]PerseidMeteor_Rowell_big.jpg[/attachment][/i]
Northern Part of Vela Supernova Remnant
http://eder.csillagaszat.hu/deepsky/350 ... er_en.html
Copyright: Iván Éder Double Halo in Hong Kong
Copyright: Wah!
[attachment=4]DoubleHalo1.jpg[/attachment][/i]
Thirsty Desert
Copyright: Ariana Ahangary
[attachment=3]desert.jpg[/attachment][/i]
NGC7129 Nebula Complex
http://www.starkeeper.it/NGC7129.htm
Copyright: Leonardo Orazi Lightning above Trieste
http://www.weather-photos.net/temp/Ligh ... vg2010.jpg
Copyright: Marko Korošec The Bridge to NGC6590
http://www.malagon.webs.com
Copyright: A. Carlos Malagón
[attachment=1]ngc6950_cmalagon.jpg[/attachment][/i]
NGC 7662: The Blue SnowBall Nebula
http://www.pbase.com/dsantiago/image/122731657
Copyright: Derek Santiago Synthetic Image of a Black Hole
Copyright: Jason Dexter
References: Doeleman et al (2008) for the observations, Dexter et al (2010) for the modeling and image. The Veil Complex
http://www.perseus.gr/Astro-DSO-NGC-6960.htm
http://www.perseus.gr/Astro-DSO-NGC-6992.htm
http://www.perseus.gr/Astro-DSO-Nebulae-Sim-3-188.htm
Copyright: Anthony Ayiomamitis
One of the showpiece constellations of the summer sky is Cygnus and which is incredibly rich with many celestial gems. The Veil Complex is one such masterpiece and which is an imager's dream. Owing to the huge amount of apparent real estate the Veil Complex occupies, I decided to go after each of the three primary segments on an individual basis and dedicated one complete evening to each one. The three images here are of the Western Veil (NGC 6960, aka Witch's Broom), the Eastern Veil (NGC 6992 and NGC 6995) as well as Pickering's Triangle (Simeis 3-188). Each of these results is based on a mixed palette of narrowband (Ha, OIII) and visual band (RGB) comprised of either 150:150:30:30:30 or 140:140:30:30:30 total integrations per channel.
<- Previous submissions
Please click on each image for best viewing; please click on the link below the
image title for more information about the image. Thank you!
_____________________________________________________________________________
<- Previous submissions
Encore: Double Rainbow of Utah
Copyright: Niel Skousen
[attachment=6]IMG_0255.JPG[/attachment][/i]
Iris Nebula and Open Cluster NGC 7023
http://www.starrywonders.com/irisst8300.html
Copyright: Steve Cannistra Perseid over St. Andrew Church, Taliándörögd, Hungary
http://ladanyi.csillagaszat.hu/
Copyright: Tamas Ladanyi
[attachment=5]perseid_100808_ladanyi_v1.jpg[/attachment][/i]
Centaurus A and Omega Centauri
http://www.astrosurf.com/lorenzi/ccd/aw_centauri.htm
Copyright: Marco Lorenzi Perseid Meteor and Ancient Bristlecone Pine
http://www.tonyrowell.com
Copyright: Tony Rowell
[attachment=0]PerseidMeteor_Rowell_big.jpg[/attachment][/i]
Northern Part of Vela Supernova Remnant
http://eder.csillagaszat.hu/deepsky/350 ... er_en.html
Copyright: Iván Éder Double Halo in Hong Kong
Copyright: Wah!
[attachment=4]DoubleHalo1.jpg[/attachment][/i]
Thirsty Desert
Copyright: Ariana Ahangary
[attachment=3]desert.jpg[/attachment][/i]
NGC7129 Nebula Complex
http://www.starkeeper.it/NGC7129.htm
Copyright: Leonardo Orazi Lightning above Trieste
http://www.weather-photos.net/temp/Ligh ... vg2010.jpg
Copyright: Marko Korošec The Bridge to NGC6590
http://www.malagon.webs.com
Copyright: A. Carlos Malagón
[attachment=1]ngc6950_cmalagon.jpg[/attachment][/i]
NGC 7662: The Blue SnowBall Nebula
http://www.pbase.com/dsantiago/image/122731657
Copyright: Derek Santiago Synthetic Image of a Black Hole
Copyright: Jason Dexter
[attachment=2]bfitmbd_scl_large.png[/attachment][/i]
While black holes emit no light themselves, they can appear quite bright due to the large amounts of radiation emitted by infalling gas. Recent observations of the supermassive black hole in the center of our Galaxy (Sagittarius A*) combined telescopes in Hawaii, California and Arizona to resolve its orbiting, magnetized plasma on event horizon scales. By shooting light rays through the curved spacetime of new simulations of gas in the vicinity of a black hole, it's possible to create a synthetic image of the black hole for comparison with the observations. The resulting false color image is the best fit model to the recent interferometric radio measurements. The observer is inclined by 50 degrees from the black hole spin axis, and the image is 12 Schwarzschild radii (~50 microarcseconds) across. The strong gravity near the black hole causes some light emitted behind it to be bent towards the observer, appearing to come from above. Doppler beaming causes the orbiting gas to be seen much more brightly on the side where it approaches the observer. The shadow of the black hole occurs in the region where the emitted light is captured rather than being deflected as it escapes to infinity, and is significantly larger than its event horizon. Future measurements using more telescopes may be able to detect the shadow, and find direct evidence for a black hole event horizon.References: Doeleman et al (2008) for the observations, Dexter et al (2010) for the modeling and image. The Veil Complex
http://www.perseus.gr/Astro-DSO-NGC-6960.htm
http://www.perseus.gr/Astro-DSO-NGC-6992.htm
http://www.perseus.gr/Astro-DSO-Nebulae-Sim-3-188.htm
Copyright: Anthony Ayiomamitis
One of the showpiece constellations of the summer sky is Cygnus and which is incredibly rich with many celestial gems. The Veil Complex is one such masterpiece and which is an imager's dream. Owing to the huge amount of apparent real estate the Veil Complex occupies, I decided to go after each of the three primary segments on an individual basis and dedicated one complete evening to each one. The three images here are of the Western Veil (NGC 6960, aka Witch's Broom), the Eastern Veil (NGC 6992 and NGC 6995) as well as Pickering's Triangle (Simeis 3-188). Each of these results is based on a mixed palette of narrowband (Ha, OIII) and visual band (RGB) comprised of either 150:150:30:30:30 or 140:140:30:30:30 total integrations per channel.
<- Previous submissions