the sense that it has no boundary, but it can have a shape... Actually, it is the space itself that has a shape... We now know that it is basically flat. William: can a black hole swallow another black hole? Ezequiel: sure! And we think that it happens, when two galaxies merge. Bernard: Do you hope to find the origin of the black hole, by looking at the first 'seeds' ? riyanatarajan: Yes indeed. To figure out how the first black holes formed in the early Universe we need to see as far back into the Universe as we can. Deeper views of the Universe with more data from say the Chandra satellite will help us track down the first ever black holes to form Jason (moderator): Want to learn more about the Chandra X-ray Observatory? See the latest news, learn about the spacecraft and find lots of other related information at http://www.nasa.gov/chandra Jason (moderator): We're working to answer your great questions. Keep them coming! To submit your own question, please type it in the box at the bottom of the window and click the 'Ask' button on the right side of the box. Thanks for your patience as we answer your questions. MooCow: do black holes power quasars? Kevin: Yes, quasars are massive black holes feeding on gas. amanning: What do the jets that extrude from the center of a black hole consist of,... possibly photonic energy? riyanatarajan: The jets we see often consist of energetic particles electrons, positrons