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1. Astronomy HyperText Book: Interstellar Medium
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 . ...
[ Сохраненная копия ]  Ссылки http://zebu.uoregon.edu/textbook/ism.html -- 4.2 Кб -- 23.01.1998
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2. XWare > APOD
Astronomy Picture of the Day . ... How do dying stars eject their outer layers? Stars that create elegant planetary nebulas like Henize 3-401, pictured above, are not unusual, causing speculation that, one day, our own Sun may look like this. A Star Cluster in Motion . ... A Setting Sun Trail . ... NGC 1569: Heavy Elements from a Small Galaxy . ... For the open cluster of stars NGC 6520, every day is like this. On the left of the above picture are many of NGC 6520's bright blue stars. ...
[ Сохраненная копия ]  Ссылки http://www.astronet.ru/db/xware/apod.html?page=98&d=2005-03 -- 15.2 Кб -- 12.04.2016
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3. Globular cluster M28, open cluster M25, and planetary nebula NGC 6781 |
... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Globular cluster NGC 2808, elliptical galaxy NGC 2986, and the Sextans Dwarf . ... Globular cluster M28, open cluster M25, and planetary nebula NGC 6781 . August 20 27, 2015: Globular cluster M28 and open cluster M25 in Sagittarius offer small-telescope owners nice views, while large-telescope owners can seek out planetary nebula NGC 6781 in Aquila. ... Globular cluster M28 . ... Planetary nebula NGC 6781 . ...
[ Сохраненная копия ]  Ссылки http://www.astronomy.com/observing/observing-podcasts/2015/08/m28-m25-and-ngc-6781 -- 63.9 Кб -- 10.04.2016
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4. GSAOI Orion Nebula Cluster Science Page
... 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. ...
[ Сохраненная копия ]  Ссылки http://www.mso.anu.edu.au/gsaoi/science/orion.shtml -- 6.7 Кб -- 01.10.2012
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5. Planetary Nebula K 648
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. ...
[ Сохраненная копия ]  Ссылки http://www.stsci.edu/~bond/k648.html -- 2.7 Кб -- 20.12.2001
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6. http://www.wro.org/neumann/RNGC_by_Constellation-Mon.pdf
Feb 28 2016 Monoceros - The Unicorn IC 446 11mmT6 F,PATCH,R-F Nebula bipolar Dec 15 2004 8 IC 2172 11mmT6 F,S,R-F Non-Existent Nov 25 2006 8 NGC 2170 H19-4 Nebula R *9 INVF,PL,NEB,E170 Mar 28 2011 12 17mmAT SMALL, FAINT,IRREGULAR,R=F, OIII FILTER NGC 2182 11mmT6 H38-4 Nebula R PB**,L*NEB,E90 Mar 28 2011 12 VF,VS,IRREGULAR,R=F, OIII NGC 2183 ... 20 Mar 29 2006 8" PF,PS,R=F, NICE GROUP PGC 20274 11mmT6 VF,OVAL,NND,AV,R=G Galaxy IAB(s)m Dec 04 2004 8" Page 3 of 3 ...
[ Текст ]  Ссылки http://www.wro.org/neumann/RNGC_by_Constellation-Mon.pdf -- 10.9 Кб -- 28.02.2016
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7. Отдел Изучения Галактики и переменных звезд
. ћ . Наши юбиляры . љљљљљљљ љљљљљљљљљ . ћ Сотрудники отдела . ћ Наша научная работа . ћ Семинар по Звездной астрономии . ћ Конференции . ћ Общий Каталог Переменных Звезд . ћ Каталог рассеянных скоплений . ћ Московская школа звездной астрономии . ћ Юбилеи сотрудников . ћ Избранные публикации . ћ Педагогическая и популяризаторская деятельность . ћ Наши интернет-ресурсы и другие полезные ресурсы . ћ Ссылки на каталоги и базы данных . ћ Фотогалерея . Присылайте Ваши вопросы и комментарии Ольге Дурлевич
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/groups/cluster/gal/ -- 22.8 Кб -- 10.04.2016
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8. ASP: NGC Images on the Net
... Non-NGC Images . ... Globular cluster in Scorpius (M80)..... image ..... caption . ... Globular cluster in Scorpius (M4)..... image ..... caption . ... Globular cluster in Oph (M107)..... image ..... caption . ... Nebula..... image . ... Globular cluster in Hercules (M13)..... image ..... caption . ... Globular cluster in Ophiuchus (M12)..... image ..... caption . ... Infrared-bright galaxy in Ophiuchus..... image ..... caption . ... Globular cluster in Ophiuchus (M10)..... image ..... caption . ...
[ Сохраненная копия ]  Ссылки http://www.astrosociety.org/resources/ngc4.html -- 48.3 Кб -- 03.01.2012
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9. APOD: May 22, 1996 - Star Cluster in the Rosette Nebula
... May 22, 1996 . Star Cluster in the Rosette Nebula . ... Explanation: Embedded in the center of the colorful and photogenic Rosette Nebula is a bright, young open cluster . The bright blue stars in this cluster, labelled NGC 2244, emit ultraviolet light that knocks electrons away from hydrogen atoms . ... The Rosette Nebula is thousands of light years distant, but light would take only about 100 years to cross it. ... Tomorrow's picture: The Violent Star Cluster 30 Doradus . ... About APOD | ...
[ Сохраненная копия ]  Ссылки http://www.sai.msu.su/apod/ap960522.html -- 4.7 Кб -- 02.10.2012
[ Сохраненная копия ]  Ссылки http://www.arcetri.astro.it/~palla/ANDREAIMMAGINI/ViaLattea/rosette_umich_big.html -- 4.3 Кб -- 02.03.2001
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11. A Spectacular View of the Lagoon Nebula | Astronotes
Astronotes Armagh Planetarium's Stellar Blog! ... Stars . ... Telescopes and Observatories . ... The ma