BTW, here's some info on Gravastars: http://en.wikipedia.org/wiki/Gravastar If you have the time, I highly recommend looking up the papers of the scientists who are behind the concept. I've read a few, and although much of the math is beyond my time constraints (and ability, lol!), the abstracts and verbage are incredibly interesting. I for one am hoping that these animals exist. Still much theoretical work to do, not to mention observational data to be taken, even though it could be generations before we can even hope to start taking data. It's noteworthy that the existence of gravastars does not exclude the existence of the classical black hole, in all it's mass manifestations. I love it when theoretical physicists think outside of the box. It's what they get paid for.