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- Fri Oct 12, 2012 4:22 am
- Forum: The Observation Deck: Latest Sky Photography
- Topic: HEIC: Cosmic Riches (M 69)
- Replies: 2
- Views: 586
Re: HEIC: Cosmic Riches (M 69)
Hi Ann, I read your post with interest. Your findings with M69 in Burnham's Celestial Handbook coincide with The Night Sky Observers Guide where Craig Crossen explains that RR Lyrae stars are poor to non-existant in younger globulars such as M69, M71 and 47 Tuc for example, so your findings appear t...