This my model of the U.S.S.S. Discovery, the ship from 2001: A Space Odyssey that went to Jupiter. It's a little out of scale. The spherical part should be a little bigger. My original plan was to make it two times as big, but I realized I wouldn't be able to build the sphere that big and if I tried to it would come out really bad. Anyway, I really didn't know how to build one. So with the sphere in The Ultimate Lego Book reference, I just started building. I was worried how to build the long part until I realized I could just use those bridge beams from that bridge building accessory bulk pack that (I think) you can still get.