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Topic: NGC 6720


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In the News (Thu 17 Dec 09)

  
 [No title]   (Site not responding. Last check: 2007-10-08)
NGC 2346 - a planetary nebula in the Monoceros constellation
NGC 5866 - A lenticular galaxy in the Draco constellation
NGC 6121 - M4, a globular cluster in the Scorpius constellation
www.informationgenius.com /encyclopedia/n/ne/new_general_catalogue.html   (307 words)

  
 AllRefer.com - Ring nebula (Astronomy, General) - Encyclopedia
You are here : AllRefer.com > Reference > Encyclopedia > Astronomy, General > Ring nebula
Ring nebula, planetary nebula in the northern constellation Lyra; cataloged as M57 or NGC 6720.
It is perhaps the most famous and beautiful nebula of this type.
reference.allrefer.com /encyclopedia/R/Ringnebu.html   (159 words)

  
 Williams College Faculty Publications and Presentations   (Site not responding. Last check: 2007-10-08)
Kwitter, Karen B. and R.B.C. Henry "A New Look at Carbon Abundances in Planetary Nebulae in the Globular Clusters Pal 6 and NGC 6441," Astronomical Journal 493, 1998, p.
Jacoby, G.H., J. Morse, L.K. Fullton, Kwitter, Karen B., and R.B.C. Henry " Planetary Nebulae in the Globular Clusters Pal 6 and NGC 641," Astrophysics Journal 114, 1998, p.
DDDM1, IC 3568, IC 4593, NGC 6210, NGC 6720, NGC 5826, and NGC 7009," Astrophys.
www.williams.edu /admin/news/facpubs.php?year=1998   (2578 words)

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