Astronomy Picture of the Day . ... 25.09.1996 . ... Well don't feel bad - this even happened to the bright young stars of the open cluster NGC 6520. On the left are the cluster's bright blue stars. They formed only millions of years ago - much more recently than our ancient Sun which formed billions of years ago. ... Information: Thursday, September 26 - A Total Lunar Eclipse . ... September 1996 . ... Publications with keywords: clouds - stars . Publications with words: clouds - stars . ...

... September 25, 1996 . Bright Stars and Dark Clouds . Credit: Anglo-Australian Telescope photograph by David Malin . ... Well don't feel bad - this even happened to the bright young stars of the open cluster NGC 6520. On the left are the cluster's bright blue stars. They formed only millions of years ago - much more recently than our ancient Sun which formed billions of years ago. On the right is an absorption nebula from which the stars might have formed. ... About APOD | ...

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... STScI-PRC00-36 GHOSTLY REFLECTIONS IN THE PLEIADES NASA's Hubble Space Telescope has caught the eerie, wispy tendrils of a dark interstellar cloud being destroyed by the passage of one of the brightest stars in the Pleiades star cluster. ... In 1890, American astronomer E. E. Barnard, observing visually with the Lick Observatory 36-inch telescope in California, discovered an exceptionally bright nebulosity adjacent to the bright Pleiades star Merope. ...

GALAXIES cenA .tiff 40 Bright Radio Galaxy M31.tiff Nikon Andromeda Galaxy (note HII regions in spiral arms) ngc6744.tiff 40 NGC 6744 a face-on spiral clouds_20d.tiff H'blad The Magellanic Clouds our nearest neighbours Lmc_7.tiff Nikon The Large Magellanic Clouds Lmc_zoom.tiff Nikon Detail of previous image smc_7.tiff Nikon The Small Magellanic Clouds smc-zoom.tiff Nikon Detail of previous image 30dor_40_BVR.tiff 40 The 30 Dor ... B [OIII] Halpha trifid.tiff 40" The Trifid Nebula. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "That's as remote as the dark side of the Moon!" ... As the tired, hackneyed refrains went on, one in particular caught my ear: " Fly me away to the bright side of the moon, and meet me on the other side." ... As the Moon orbits the Earth, different parts of it get illuminated by the Sun. ... Bad Addendum : At the end of the album "Dark Side of the Moon" by Pink Floyd, there is a voiceover that actually says "There is no dark side of the moon. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... These noctilucent "night-shining" clouds (or NLCs) are believed to form by sunlight reflecting off ice crystals high in the atmosphere, and usually appear in the northwest to northeast. ... NLCs occur at very high altitudes, in excess of 50 miles high, in the region above the stratosphere known as the mesosphere and at first sight they look like cirrus clouds. ... Noctilucent Clouds, July 2006 . ... NLCs from Space . ...

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... Posts tagged ?dark energy? ... ArXiv] 4th week, May 2008? ... Comment . ... vlk on [MADS] Parallel Coordinates . upvc windows on [MADS] Parallel Coordinates . ... Alfred Inselberg 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 . ...

... 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 ...

... Planetarium Staff . ... Armagh Goes Digital . ... Freedom of Information . ... For more information regarding Armagh Planetarium please contact us using the information listed below. Please note all Digital Theatre shows must be pre-booked by telephone. Visiting Armagh Planetarium . ... A. Please visit our show times page for details of show times. ... Q. When are your telescope nights? ... Q. IтАЩve named a star after a family member, if I come to the Planetarium can you show it to me? ...