... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 August 24 . A Pileus Iridescent Cloud Over Ethiopia . ... Pictured, behind this darker cloud, is a pileus iridescent cloud , a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different amounts. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... Yes, but how many dark clouds have a multicolored lining? Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different amounts. ... TrES 2b: Dark Planet . ... Planet TrES-2b reflects back less than one percent of the light it receives, making it darker than any known planet or moon, darker even than coal. ... The Fairy of Eagle Nebula . ... Perseid Below . ...

... August 6, 1998 . Infrared Horsehead . ... Explanation: This famous cosmic dust cloud was imaged in infrared light by the European Space Agency's Infrared Space Observatory (ISO) satellite. The false-color picture shows the bright infrared emission from dust and molecular gas in part of the Orion star forming region surrounding the Horsehead Nebula . In visible light, the horsehead-shaped dust cloud looks dark against a background of bright glowing gas. ... About APOD > . ...

Neptune . ... Triton . Neptune 291k gif . Full Disk Neptune 93k gif ; 29k jpg . ... New Dark spot 25k jpg ; 113k gif ; caption ; press release . ... Another thin Crescent of Neptune 166k gif . ... low resolution shot of Neptune, possibly showing great black spot 210k gif . ... Parting view of Neptune and moon Triton 59k gif ; 17k gif ; 23k jpg . ... Small Dark Spot 190k gif ; 133k jpg . Small Dark Spot 55k gif ; 23k jpg . ... The Great Dark Spot 423k gif ; 153k gif ; 97k jpg . ...

Most of these images were obtained by Mike Bessell, Michelle Buxton, Hwankyung Sung, Ralph Sutherland and Bob Watson at SSO using a 2Kx2K Site CCD behind a Nikon or Hasselblad lens or directly on the 1m telescope. A few images are from the Hubble Space Telescope. Some of the M42 images were obtained with the KPNO 1m and ESO NTT telescope. One image is a mosaic of IRAS images. ... Details of the CCD imaging program at MSSSO. ... antenna.jpg (53KB) . ... ngc6744.jpg (59KB) . ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... August 2005 . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Astronomy Magazine . ...

... A new dish for the deep space network . ... On Thursday 20 August, CDSCC added a new dish to its family of 4. DSS36 will be a new 34 metre beam waveguide (BWG) antenna operating at X, Ka and ultimately at S band frequencies to assist 40 different space missions currently on CDSCC's tracking manifest. ... This new investment will see CDSCC supporting the growth of new space missions to the southern ecliptic and continues CDSCC's role with the DSN for NASA and JPL, for at least another 25-30 years. ...

Making HST Pictures: Examples and Illustrations . ... These illustrations represent some of the steps and techniques used to produce “pretty pictures” from HST images. ... TIFFs (ftp) . ... Separate images are exposed through different color filters. ... An alternate way to make color images . ... Eight bit (one byte) images contain 256 different values that may be represented by 256 shades of gray or 256 arbitrary colors from a color map (or palette) of all possible colors. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Our Galaxy . Milky Way . Stars . ... Other Galaxies . ... Barred spiral galaxy NGC 6744 is located in a constellation of the southern hemisphereтАЩs sky, called Pavo (Latin for peacock). At a distance from our Solar System of about 30 million light years, NGC 6744 is not only one of the closest spiral galaxies but is thought to be one of the visible galaxies most like our own Milky Way. Is it our cosmic doppelganger? ...

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. ...

... self-absorption - the absorption of light shining on an object by a process similar to that which produced the light originally; if a cloud emits less light than it absorbs from other clouds behind it, this net loss of light, termed self-absorption , causes the foreground cloud to appear darker than the background field (the term is from spectroscopy, where small absorption dips sometimes occur in larger emission lines, making the latter look as if it is absorbing part of itself) . ... HISA Main ...

Images and text 2003 Paul Valleli . While up at Stellafane for pre-convention preparations, I spent some early morning times, experimenting with different videography setups on the 13" F/10 Schupmann at the McGregor Observatory. ... Mars was too bright and would have required neutral density filters. ... Next time, I will try 12mm and 9mm projections. ... I aquired about ten thousand frames by 3AM, at which time a breeze picked up and the seeing went to Hellas! ... 2003 Paul Valleli . ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . ... Listed Since July 15, 1998 . ... Web Site . ... However, you must Login to submit a comment. ... Web . www.astronomy.net . About Astronomy Net | ... 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 ...

... Posts tagged ?Big Picture? ... Our hometown rag (the Boston Globe ) runs an occasional series of photo collections that highlight news stories called The Big Picture. ... vlk on [MADS] Parallel Coordinates . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

... Bad Astronomy . Misconceptions . ... I have a fun video on how to stand an egg on end on my blog at Discover Magazine . ... At the end of the show, one of the characters looks up the words "egg" and "equinox" on the web... and says it sent him to "thingsthatarewrong.com". ... Bad Astronomy : Only on the day of the Vernal (spring) Equinox, can you stand a raw egg on its end. Good astronomy : If you can stand a raw egg on end, it has nothing to do with the Equinox. ... 2008 Phil Plait. ...

The Big Bang was not an explosion from a single point, with a center and an edge. ... Each dot represents a "galaxy". Two of the galaxies have a ring of red photons moving out from them. Most of the photons are cosmic microwave background photons that were present since the Big Bang but which have been traveling freely only since 0.0003 Gyr after the Big Bang. ... However, all parts of the Universe started with CMBR photons, not just the two green galaxies. ... FAQ | ...

Cloud cover and water vapor observed at Oma site,Tibet W ang Hong-shuai (National Astronomical Observatories of China) Kislovodsk 8.10.2010 Wang Hongshuai ­ Kislovodsk ­ Oct.2010 2 2008.11 Oma Site 40 m CT 2 tow er 4.5 m antenna Satellite communication w eather station 10m tow er SBIG seeing m onitor DIMM seeing dome MIR cloud m onitor R en ew al p o w er supply Wang Hongshuai ­ Kislovodsk ­ Oct.2010 3 PWV<0.5 5 .0 % 1 0 .1 % 8 .1 % Percent. ... 05 8.3% Percent . ...

... Day-by-day lines contain complete set and intended for those who have been there (I mean, in Kyoto :) . ... Large format is mainly for 1600x1200 screens and fast link (pictures are up to 150K in size). Normal is for typical 1024x768 screen (i.e. 15" monitors). ... Photos look incredible on it. ... Large . ... Normal . ... Thumbnails . ... Contents with thumbnails: Large | ... Nara, one of the historical cities of Japan . ... August 17, Sunday. ... Nara. ... return to photo album contents | ...

... Colonel, CAF, Ret, Astronaut, Canadian Space Agency, Canada . ... In July 1992 he was selected for training as a mission specialist at NASA. ... Upon completion of his training at Johnson Space Center he served at NASA and occupied different posts, in particular during 25 shuttle missions he was NASA's Chief СарСот, the voice of mission control to astronauts in orbit. ... He performed the first space flight on November 12 - 20, 1995 as a mission specialist in the crew of the Atlantis shuttle (STS-74...

... SEARCH ASP SITE: Match ALL words Match ANY word . ... Astronomy . ... Hubble Space Telescope Images: http://hubblesite.org/newscenter/newsdesk/archive/releases/image_category/ . ... The Chandra x-ray telescope (in orbit around Earth) has been sending back a wide range of images of what deep space objects would look like if seen with "x-ray sensitive" eyes. ... Web Sites for Asking Astronomy Questions . ... Ask an Astronomer for Kids: http://coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/index.shtml...