in space where all the mass of the black hole is concentrated. vdls612: is it possible to arrange through gravity interactions something like a black hole "solar system", I mean like a huge black hole with smaller black holes orbiting around him? Kevin: Yes but it's likely that the two black holes would eventually merge. rositacr: a black hole stops growing ? Kevin: when it runs out of food! Bernard: Is there a lot of Philosophy involved in the study in Physics? I mean, do seperate scientists, or groups of scientists, have diffrent but plausible ideas ? riyanatarajan: Yes, there are a lot of philosophical issues at stake in Physics. For example one of the profound questions that philosophers and scientists grapple with is `Why is there anything in the Universe?' Philosophers and cosmologists typically ask different questions but they do have a common thread often. Sondra: Are there jobs at NASA for those who are not physicists? Astronomy was my first love, but I just graduated with a degree in political science and currently lack the funds to go back... Jason: Learn more about working for NASA by visiting http://www.nasa.gov/about/career/index.h\\... Janus: So all mass that enters a black hole just ends up being compressed at singularity point? Kevin: yes, as far as we know from relativity Jason (moderator): It's time for our last questions for this chat... beih: Guys keep up the good work -you and your research make the world a more understandable place! I envy ur job!