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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 . ...

Astronomy Picture of the Day . ... 11.01.2014 . ... Of course, the region includes objects with other catalog designations : notably NGC 2327 , a compact, dusty emission region with an embedded massive star that forms the bird's head (aka the Parrot Nebula, above center). Dominated by the reddish glow of atomic hydrogen, the complex of gas and dust clouds with bright young stars spans over 100 light-years at an estimated 3,800 light-year distance. ... Publications with keywords: emission nebula . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The majestic star-forming region in the Lagoon Nebula. The pale ring to the right is an internal reflection in the telescope.€а (Image credit: ESO/ VPHAS+/ V. Kalari and J. Vink (Armagh Observatory) . ... The 18 component images were further processed twice. ... Venu and his colleagues use images like this to identify individual young forming stars in the Lagoon Nebula and determine their ages. ...

... 2009 March 12 . Thor's Helmet (NGC 2359) and Planetary Nebula . ... Explanation: At the right, Thor's Helmet (NGC 2359) seems to gaze across a lovely star field. ... Heroically sized even for a Norse god, Thor's Helmet is about 30 light-years across. ... In contrast, the faint, round nebula is a planetary nebula , the gaseous shroud of a dying lower mass star. The distance to Thor's Helmet is estimated to be about 15,000 light-years. ... About APOD | ...

... ESO PR Photo 03a/01 . ... Caption : PR Photo 03a/01 is a colour composite mosaic image of the central part of the Orion Nebula , based on 81 images obtained with the infrared multi-mode ISAAC instrument on the ESO Very Large Telescope (VLT) at the Paranal Observatory. The famous Trapezium stars are seen near the centre and the photo also shows the associated cluster of about one thousand stars, about a million years old. Technical information about this photo is available below. ...

... Tonight's Sky . ... Observing . ... Sky this Month . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... The Golden Earring, planetary nebula NGC 2867, and barred spiral galaxy NGC 3109 . ... Observing Podcasts . ... Astronomy for Kids . ... The Iris Nebula in the constellation Cepheus . ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... 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]. ...

... Galactic Cirrus (Integrated Flux Nebula / IFN) - газопылевая туманность MW 3 Volcano Nebula в созвездии Большой Медведицы (Ursa Major) .. ... Galactic Cirrus (Integrated Flux Nebula / IFN) MW 3 Volcano Nebula .: ... Астроном Steve Mandel обнаруживший фрагменты этих призрачных образований на изображениях звездного неба в околополюсной области (Galactic cirrus cloud G251.2+73.3 northern galactic pole) назвал их Integrated Flux Nebula, сокращенно IFN .. ...

The Astronomy Shop . ... Shop | ... Cards | ... Sold in sets of 8 cards (two of each image) with envelopes in a Keepsake Wallet. ... Starbirth Clouds in M-16, Starbirth in the Trifid Nebula, Live Cycle of Stars in Galactic Nebula NGC 3603, and Inside the Lagoon Nebula. ... Majestic Spiral Galaxy NGC 4414, A Grazing Encounter of Two Spiral Galaxies, Infant Stars Ring Core of Galaxy NGC 4314, and Galactic Silhouettes. ... We have bulk pricing available. ... www.astronomy.net . About Astronomy Net | ...

ATMoB Awards Program - Messier Marathon Worksheet Observer: Date: Instrument(s) Used: Location: Messier Observing Catalog/Worksheet Observing Order 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Messier Number M 77 M 74 M 33 M 31 M 32 M110 M 52 M103 M 76 M 34 M 45 M 79 M 42 M 43 M 78 M1 M 35 M 37 M 36 M 38 M 41 M 93 M 47 M 46 M 50 ...

... Posts tagged ?crab nebula? ... An email was forwarded with questions related to the data sets found in ?Be an INTEGRAL astronomer? Among the sets, the following scatter plot is based on the Crab data. ... Tags: ANOVA , block design , crab nebula , F-test , gaussinity , integral , light curve . ... Comment . ... Entries RSS . Comments RSS . ... vlk on [MADS] Parallel Coordinates . upvc windows on [MADS] Parallel Coordinates . ... Alfred Inselberg on [MADS] Parallel Coordinates . ...

Name Last modified Size Description . Parent Directory - nightsky_20120229.jpg 2012-04-17 03:13 1.3M notes.txt 2012-11-23 01:00 234 . Apache/2.4.6 (Linux/SUSE) Server at www.astro.louisville.edu Port 80

. The light nebula in Orion constellation. The nebula in Orion's constellation is the cloud of ionized hydrogen, luminiscenting due to reworking of four stars irradiation (these stars are seen because of the great brightness of the central part of nebula). Back .

... Non-NGC Images . ... Bright nebula in Orion (and Horse Head)..... image . ... Diffuse nebula in Orion (M78)..... image ..... caption . ... Galactic cluster in Auriga (M37)..... image ..... caption . ... Galactic cluster in Gemini (M35)..... image ..... caption . ... Rosette nebula..... image ..... caption . ... Spiral galaxy in Cepheus..... image ..... caption . ... Galactic cluster in CMa (M41)..... image ..... caption . ... Galactic cluster in Monoceros (M50)..... image ..... caption . ... Galaxy ...

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... Classes . ... Nebula Class Reference . ... getInfoString (const StelCore *core, const InfoStringGroup &flags) const . ... getCloseViewFov (const StelCore *core=NULL) const . ... getVMagnitude (const StelCore *core, bool withExtinction=false) const . ... getSelectPriority (const StelCore *core) const . ... getEquinoxEquatorialPos (const StelCore *core) const . ... getJ2000GalacticPos (const StelCore *core) const . ... getPositionInfoString (const StelCore *core, const InfoStringGroup &flags) const . ...

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 . ...

Images taken by 2002-2003 RSAA Summer Scholars on the SSO 40 inch telescope on Wed 15 Jan 2003 and Thur 16 Jan 2003 . With each image is the objects identifying number, what the object is (usually obvious) and what constellation it is located in. ... Most of the images are greyscale and were taken without the use of filters. The exception is NGC 3132 Planetary Nebula in Vela which was taken with B, V and R filters and these images combined to make a colour image. ...