It must be amazing - I wish I had the brains :D I'll stick with galaxy zoo tho! Kevin: Anybody can get involved in research, whether as a citizen scientist (zooniverse.org) or by becoming a professional. Alien: what is the biggest black hole in space Ezequiel: The biggest black holes that we know live in the center of the big elliptical galaxies in the centers of galaxy clusters... There can be about 10^10 solar masses... that's 10 billion times the mass of the sun. Wolf: How about the fact you can not prove anything about black holes ( the inside) since no one has ever seen them. riyanatarajan: We do observe their gravitational effects fairly directly. For instance if you spacegen: Why don't galaxies get pulled into their black holes? Ezequiel: There are many forces at play. Galaxies are in a dynamical equilibrium, which explains why they don't collapse to their center. Also, a black hole is a small fraction of the total mass in a galaxy. Miss_Maybe: were all of you interesting in space scinece since you were kids? or it naturaly suddenly appeared? Kevin: I always liked science... riyanatarajan: continuing.... from the motions of the stars around the center of our galaxy (their closed elliptical orbits) we know that there is a large compact object in the center.. blackholeuser: Can black holes be used to explain the missing mas in the universe Ezequiel: As far as we know there are not enough of them. Jason (moderator): This ends