All the above answers are totally valid. <img src="/images/icons/smile.gif" /><br /><br /><font color="yellow"> Big Bang inflated the space, Universe is expanding in the space created by big bang, is it right? </font><br /><br />Well the theory goes that the big bang happened, and in the milliseconds afterwards, the universe inflated from a microscopic size to a few meters across, violating the speed of light. But it was space that inflated, not the matter inside it, so there is no violation of the laws of physics here.<br /><br />Then space (including the matter in it) started expanding and continues to expand. Currently we can see a universe around 27 billion ly across, but that visible universe is now over 150 billion ly across due to the comoving distance. We don't know how much more there is.<br /><br /><font color="yellow"> Or Universe is still expanding and inflating space? </font><br /><br />Supposedly, the inflation only happened in the milliseconds after the big-bang. Now there is only expansion.<br /><br /><font color="yellow"> According to scientist, our universe is stretch around 150billion light years, does that mean the distance from one end star to another end? </font><br /><br />No, that is the comoving distance of our universe. This is our observable (not visible) universe. One day we may be able to see 78 billion light years in every direction, but not for another 65 billion years or so! And of course, by that time, those distant objects will be even further away. Space and time are intrinsically linked. There is probably much more universe than that!<br /><br /><font color="yellow"> Are there spaces after the farthest object? </font><br /><br />We don't know, as we cannot observe the "edge" of the universe, or even know if it has an "edge"<br /><br /><font color="yellow"> What lies beyond the space? </font><br /><br />Again we don't know, but we can suppose that whatever is outside our universe (if there is an outsi <div class="Discussion_UserSignature"> <p><font color="#ff0000">_______________________________________________<br /></font><font size="2"><em>SpeedFreek</em></font> </p> </div>