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adsabs.harvard.edu/full/1899ApJ....10..266K
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OF the four annular nebulae known to the Herschels, only two are (easily) visible in the United States and Europe. One of these, the ring nebula in Lyra, has ...
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adsabs.harvard.edu/full/1906MNRAS..66..104B
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In Monthly Notices of the* Royal Astronomical Society for 1900 JTaaiuary I have given a paper on the Annular Nebula of Lyra (M ~`), in which it was shown that ...
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www.theepochtimes.com/n2/science/annular-planetary-nebu...
www.theepochtimes.com/n2/science/annular-planetary-nebula-shapley-1-photo-142131.html
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Nov 15, 2011 ... This planetary nebula is known as Shapley 1, named after the American astronomer Harlow Shapley, who discovered it in 1936.
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adsabs.harvard.edu/full/1900MNRAS..60..245B
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2 i86, Bd. 92, Professor Hall has given measures of some of the small stars near the annular nebula of Lyra (M 57), made with the 26-inch at Washington in 1877 ...
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onlinelibrary.wiley.com/doi/10.1002/asna.18961401803/pd...
onlinelibrary.wiley.com/doi/10.1002/asna.18961401803/pdf
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The apparent latitude at transit was -111'49. Dearborn Observatory, Evanston, Ill., I 896 February. G. W. Hough. Micrometrical Measures of the Annular Nebula of ...
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onlinelibrary.wiley.com/doi/10.1002/asna.18961401803/ab...
onlinelibrary.wiley.com/doi/10.1002/asna.18961401803/abstract
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Micrometrical Measures of the Annular Nebula of Lyra (M. 57). E. E. Barnard. Article first published online: 23 MAR 2006. DOI: 10.1002/asna.18961401803 ...
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forums.chiffandfipple.com/viewtopic.php?f=10&t=83747&st...
forums.chiffandfipple.com/viewtopic.php?f=10&t=83747&start=0&sid=a393b46f59ae96c5ce54f1130bbcf6a2
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I remember really enjoying that book. Can't remember a thing about it now. Perhaps I'll try and excavate it ... "Only connect!" Top. Profile E- ...
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www.nasaimages.org/luna/servlet/detail/NVA2~4~4~7619~10...
www.nasaimages.org/luna/servlet/detail/NVA2~4~4~7619~108145:Shapley-1--An-Annular-Planetary-Neb
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This particular planetary nebula, designated Shapley 1 after the famous astronomer Harlow Shapley, has a very apparent annular ring like structure. Although ...
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asterisk.apod.com/viewtopic.php?f=9&t=24906
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Shapley 1: An Annular Planetary Nebula Explanation: What happens when a star runs out of nuclear fuel? For stars about the mass of our Sun, ...
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