... ESO, the European Southern Observatory . ... Travel and Contacts . ... ESO . ... Survey Telescopes . ... This image shows the intricate structure of part of the Seagull Nebula, known more formally as IC 2177. These wisps of gas and dust are known as Sharpless 2-296 (officially Sh 2-296) and form part of the т??wingsт?? of the celestial bird. This region of the sky is a fascinating muddle of intriguing astronomical objects т?? a mix of dark and glowing red clouds, weaving amongst bright stars. ...

... Colorful Star Clouds in Cygnus . ... Featured here is a star forming region rich in glowing gas and dark dust toward the constellation of the Swan (Cygnus), near the bright star Sadr. ... Toward the right of the image is Barnard 344, a dark and twisted dust cloud rich in cool molecular gas. ... While the glowing red gas is indicative of small emission nebulas, the blue tinted areas are reflection nebulas -- starlight reflecting from usually dark dust grains. ... NGC 3310: A Starburst Spiral Galaxy ....

Astronotes Armagh Planetarium's Stellar Blog! ... Universe . ... Space Flight . ... 1 Comment Located 12 million light years away in the direction of the constellation Ursa Major, Messier 82 is sometimes called the тАШCigar GalaxyтАЩ from its shape. ... Continue Reading.. ... Posted on September 21, 2012 | ... 1 Comment The Universe is 13.75 billion years old.It is easy to say, but what does that mean in Earthly terms?Let?s squeeze the whole history of the Universe into a year! ...

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 October 29 . IC 1871: Inside the Soul Nebula . ... Explanation: This cosmic close-up looks deep inside the Soul Nebula. ... At an estimated distance of 6,500 light-years the star-forming complex lies within the Perseus spiral arm of the Milky Way , seen in planet Earth's skies toward the constellation Cassiopeia. ... About APOD | ...

We present new images of the reflection nebula surrounding the R Coronae Borealis Star, UW Centauri. ... Instead, the morphology of the nebula appears to change as different parts are illuminated by light from the central star that is modulated by shifting thick dust clouds near its surface. ... In this way, the central star acts like a lighthouse shining through holes in the dust clouds and lighting up different portions of the nebula. ... ADS Citation Query . citations = 21 . ...

. This image shows the intricate structure of part of the Seagull Nebula (IC 2177). These wisps of gas and dust are known as Sharpless 2-296 and form part of the тАЬwingsтАЭ of the celestial bird. This region of the sky is a fascinating muddle of intriguing astronomical objects тАФ a mix of dark and glowing red clouds, weaving among bright stars. // ESO

... The interstar media . The interstar media includes the rarefied substance (gas and dust) electromagnetic radiation, the space beams, neutrino and other kinds of materia which fill the space (see the circulation of gas and dust in the Universe ). ... The nebula of the Alter . ... The gas-dust nebulas. ... The gas nebulas galaxical are shining due to the transformation of the shot waved (ultraviolet) radiation of the very hot stars located in the nebula or near it into the visible light. ...

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. ...

... Archives . ... Poisson vs Gaussian . ... Probability density functions are another way of summarizing the consequences of assuming a Gaussian error distribution when the true distribution is Poisson. We can compute the posterior probability of the intensity of a source , when some number of counts are observed in a source region, and the background is estimated using counts observed in a different region. ... Tags: background , gaussian , PDF , Poisson . ... Chandra Blog . ...

The neutral hydrogen in dust cloud . ... The intensity of line emission of neutral hydrogen (HI) is proportional to concentration of gas and is inverse proportional its temperature.Therefore the reduction of intensity emission of HI in dust clouds could not be interpeted simple. It has been observed the decreasing of HI line absorption at radiation frequencies and coordinates of the dense dust cloud which covered the most part of NGC 6618 nebula (figures 1 and 2). ...

... STScI-PRC95-44a PILLARS OF CREATION IN A STAR-FORMING REGION (Gas Pillars in M16 - Eagle Nebula) Undersea corral? ... These eerie, dark pillar-like structures are actually columns of cool interstellar hydrogen gas and dust that are also incubators for new stars. ... They are part of the "Eagle Nebula" (also called M16 -- the 16th object in Charles Messier's 18th century catalog of "fuzzy" objects that aren't comets), a nearby star-forming region 7,000 light-years away in the constellation Serpens. ...

... The high angular resolution CGPS images of atomic hydrogen emission reveal a wide-spread, cold atomic hydrogen component of the interstellar medium in the form of dark self-absorption cloud complexes. These clouds resemble molecular cloud complexes in structure and trace the spiral arm structure of the Galaxy. ... Nevertheless, continuum absorption studies show that some of the cold atomic hydrogen clouds have temperatures as low as 15 - 20 K --- similar to dense molecular clouds. ...

... See also Radio continuum study of the MC, Part IV J/A+AS/121/321 SMC catalogue of radiosources (Filipovic+ 1997) ================================================================================ A radio continuum study of the Magellanic Clouds. Part V: Catalogues of radio sources in the Small Magellanic Cloud at 1.42, 2.45, 4.75, 4.85 and 8.55 GHz. ... A total of 224 sources were detected at at least one of these frequencies, 60 of which are reported here for the first time as radio sources. ...

... Coalsack Dark Nebula или Black Magellanic Cloud - темная туманность Угольный мешок (Caldwell 99) в созвездии южного полушария Крест / Южный Крест (Crux, Southern Cross, Crucis, Cru) .. ... Просмотр полной версии : Coalsack Dark Nebula или Black Magellanic Cloud - темная туманность Угольный мешок (Caldwell 99) в созвездии южного полушария Крест / Южный Крест (Crux, Southern Cross, Crucis, Cru) .. ... Поиск направления на Южный Полюс через звезды созвездия Крест / Южный Крест (Crux, Southern Cross) .:...

... Astronomy news . ... Double Engine Fuels Star's Remarkable Nebula . ESO has just released a stunning new image of a field of stars towards the constellation of Carina (the Keel). ... Interactions in this double system, surrounded by a dusty disc, may be the engine fuelling the star s remarkable nebula. The new image, showing a very rich field of stars towards the Carina arm of the Milky Way, is centred on the star HD 87643, a member of the exotic class of B[e] stars [1]. ...

... a spiral galaxy some million light years away, made by combining images . ... 1st February using the Armagh Robotic Telescope at the Armagh Observatory. ... Image credit: Simon Jeffery. Astronomers Simon Jeffery and Jack Wright have obtained their first images of deep-space objects using a new тАЬroboticтАЭ telescope at Armagh Observatory. ... Simon Jeffery, project scientist for the new telescope, said: "After two years of hard work, it is very satisfying to see the first images looking so good. ...

... Research . ... The major problem in HVC research is the unknown distance towards most of the HVCs. ... Thilker et al. (2004) used the Green Bank Telescope (GBT) to map an area of $7^{\circ} \times 7^{\circ}$ around M31 in H i . They discovered a population of HVCs located within a projected distance of about $50~\mathrm{kpc}$ from M31. ... 2004). ... The remaining HVCs around M31 are isolated in position and velocity and may represent primordial, dark-matter-dominated clouds. ...

... Our Sun is part of a huge wheel-shaped collection of stars. ... Astronomers have long suspected it was a very massive black hole, and that every galaxy had such a central mass, created early in the history of the universe. ... However, unless that object happens to be headed directly at the black hole (a relatively small target) it will just swing around and fly away again, like a comet making a pass at the Sun. The velocity acquired in falling towards the black hole also helps it escape. ...

A 215 to 265 GHz spectral line survey of the Sgr B2 molecular cloud By A l b e r t Numme l i n e­mail: albert@bele.oso.chalmers.se Onsala Space Observatory, S­439 92 Onsala, SWEDEN The spectrum of the Sgr B2 molecular cloud has been surveyed between 215 and 265 GHz towards 3 positions, the dense cores Sgr B2(N)and Sgr B2(M), and the quiescent core Sgr B2(NW). ... 1993)). ... 1991)). ... Albert Nummelin: Spectral line survey of the Sgr B2 molecular cloud 3 Lis D.C., Goldsmith P.F., 1991, ApJ, 369, 157. ...