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- Mon Sep 14, 2009 5:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Center of Omega Centauri (2009 Sept 14)
- Replies: 16
- Views: 2823
Re: Center of Omega Centauri (2009 Sept 14)
Can anyone tell me why, with so many red giants in the picture, there are no planetary nebulas? Shouldn't some of the red giants have evolved to the white dwarf stage? Is extreme radiation causing planetaries to be so short lived that they don't show-up?