111 citations · 179 across the 3 of their papers we have counts for
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P. A. M. van Hoof, G. C. Van de Steene, M. J. Barlow +27
Herschel PACS and SPIRE images have been obtained of NGC 6720 (the Ring Nebula). This is an evolved planetary nebula with a central star that is currently on the cooling track, due…