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 . Spherical Planetary Nebula Abell 39 . ... 8.10.2012 . ... Lemmon SkyCenter , University of Arizona Explanation: Ghostly in appearance, Abell 39 is a remarkably simple, spherical nebula about five light-years across. ... October 2012 . ... Publications with keywords: planetary nebula - Abell 39 . Publications with words: planetary nebula - Abell 39 . ... NGC 7293: The Helix Nebula . Planetary Nebula Abell 7 . ... Bright Planetary Nebula NGC 7027 from Hubble . ...

... 2013 December 5 . Planetary Nebula Abell 7 . ... Explanation: Very faint planetary nebula Abell 7 is some 1,800 light-years distant, just south of Orion in planet Earth's skies in the constellation Lepus, The Hare . ... A planetary nebula represents a very brief final phase in stellar evolution that our own Sun will experience 5 billion years hence , as the nebula's central, once sun-like star shrugs off its outer layers. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... 2001 January 23 . Spherical Planetary Nebula Abell 39 . ... Planetary nebula Abell 39 , now six light-years across, was once a sun-like star's outer atmosphere expelled thousands of years ago. The nearly perfect spherical nature of Abell 39 allows astronomers to accurately estimate how much relative material is actually absorbing and emitting light. ... Abell 39 lies about 7000 light years away, although several galaxies millions of light years away can be seen through and around the nebula. ...

Our team has obtained HST WFPC2 images of this prototypical example of a planetary nebula in a globular cluster. K 648 was cataloged as a star by Kustner, but identified spectroscopically as a planetary nebula by Pease, both in the 1920's. General WFPC2 view of M15 and K 648 (located near top left edge) . ... The nucleus is shown to have an unusually high mass of 0.60 Msun, and we argue that it must have undergone mass augmentation in a binary that has undergone mass transfer or a merger. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . ... des pages consacr†йes †а la publication de vos photos Mais c'est aussi une vraie communaut†й avec laquelle partager votre passion et nourrir votre curiosit†й. Accueil La Spiral Planetary Nebula retrouve ses vraies couleurs . ... 07/04/2016 - Plong†йe au centre de la Voie lact†йe . 01/04/2016 - Impact r†йcent sur la face cach†йe de la Lune . ... 22/03/2016 - LтАЩoptique du JWST est achev†йe . ...

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... Tonight's Sky . ... The Magazine . ... Observing . ... Magazine . ... 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 . ... Astronomy for Kids . ... A stellar summer planetary nebula . ... 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 Magazine . ...

... NGC 1501 - планетарная туманность Устрица (Oyster Nebula) или Верблюжий глаз (Camel's Eye Nebula) в околополюсном созвездии Жирафа (Camelopardalis) .. ... Просмотр полной версии : NGC 1501 - планетарная туманность Устрица (Oyster Nebula) или Верблюжий глаз (Camel's Eye Nebula) в околополюсном созвездии Жирафа (Camelopardalis) .. ... NGC 1501 Устрица (Oyster Nebula) или Верблюжий глаз (Camel's Eye Nebula) .: ...

... GSAOI Home . ... Science . ... Deep imaging at J , H , and K is required to identify all stellar objects, brown dwarfs, and planetary mass objects in the central region of the Orion Nebula Cluster down to masses comparable to that of Jupiter. This is required to establish the initial mass function, i.e., the number of stars of each mass that have formed, in this region of intense massive star formation. ... The fields of the GSAOI detectors are shown as four green squares in each frame. ...

Feb 28 2016 Cygnus - The Swan By RA Catalog NGC 6764 NGC 6783 NGC 6798 IC IC 1300 4867 M Her Object Type Glxy SB(s)bc Glxy C Glxy S0 Non-Existent Glxy S0 Glxy Scd: Glxy SAcd Glxy SAB(s)c? Glxy SAc: Non-Existent Open Cl 11.0 III 1 r Open Cl 11.0 I 1 r Non-Existent Mag Alias/Notes 12.6 15.3 14.2 14.3 14.4 14.6 14.1 14.6 6.8 7.3 (STAR) 13 9.8 13.8 7.8 14.2 UGC 11470 MCG 9-32-12 ...

... 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 ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Space Flight . ... A glorious cosmic butterffly imaged by the HST (Image credit: NASA/ESA) . This dramatic image looks like some vast cosmic eruption, and that impression is entirely correct. ... Designated NGC 6302 and often called the Butterfly Nebula, this is an example of a planetary nebula. ... Here you will find the latest news and views from the fascinating worlds of astronomy and space exploration. ...

6th of March 2015 . The first "water fountain" in a planetary nebula . ... G mez et al. (2015) have used the Australia Telescope Compact Array (ATCA) to map the water maser emission in IRAS 15103-5754, an object that has just become a planetary nebula. ... IRAS 15103-5754 is the first known case of a water fountain that is already a planetary nebula (all others are in previous evolutionary stages. ... Credits: 2015. ... today * ATNF | ...

... 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. ...

Next: Public Understanding of Science, Up: Technical Research Summaries Previous: New Approaches to Risk . ... Michael Smith has been analysing new infrared data collected from 11 PPN and PN by Chris Davis (Joint Astronomy Centre, Hawaii) to search for clues as to how the objects evolve. ... Georgi Pavlovski studied the properties of supersonic turbulence in molecular clouds and its effect on the molecular cloud properties and their chemical evolution. ...

... A2233 Date Received: 2006-May-31 23:23:18 Technical Page Proposal Type: General Category : Sub- Category : Observation Category : Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Short Astronomy Spectroscopy Galactic 3 Hours 90 minutes Neutral Hydrogen Mapping of the Planetary Nebula M27 We propose to acquire a spatial- velocity data cube of the neutral hydrogen distribution in direction of the the planetary nebula ...

Our publications in 2007 year Pustilnik, S. A.; Tepliakova, A. L.; Kniazev, A. Y.; Burenkov, A. N.; SAO; Russia; SAAO; Africa, South . eprint arXiv:0712.4205, submitted to Astrophysical Bulletin (SAO) (12/2007) . Pustilnik, S. A.; Tepliakova, A. L.; Kniazev, A. Y. eprint arXiv:0712.4007, submitted to Astron.Lett (12/2007) . ... Kniazev, A. Y.; Pustilnik, S. A.; Zucker, D. B. eprint arXiv:0707.4285, submitted to MNRAS (07/2007) . ... eprint arXiv:0707.4288 (07/2007) . ...

... 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 . ...

... Soap Bubble Planetary Nebula and Crescent Nebula . ... Hubble Palette, 5 nm Narrowband filters, S-II (Red Channel): H-alpha (Green Channel): O-III (Blue Channel) - 30: 55: 40 minutes, 5 minute subframe, binned 1x1, Total= 125 minutes, Adobe Photoshop blue enhancement to highlight the nebula, Takahashi Epsilon-180, SBIG STL-6303E CCD camera, ATMoB Clubhouse, Westford, MA, 13 August 2010 . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...