Hi, I am going to give you a rather rude welcome to BOB since I am going to close your topic. 
The reason isn’t because we’re rude people, but because this topic comes up over and over. There is an entry in the FAQ for the Universe Designer, and there are topics that have been posted even earlier today with the same question. So do please take a few minutes to look around (meaning search) before asking a question, thanks.
Dave Rathbun 
(BOB member since 2002-06-06)