::::::::::::::: Sourcing looks great, nice job - the only potential issue I see is the "Galaxies" text up top. Looks like that was made with a logo generator of some sort? 
 :::::::::::::::As for the portal, it does seem to fit a bit better - the problem is that you can never make a single image "fit perfectly", because people view the page at different resolutions. Image sizes don't change with the browser. What works for you won't work for me, and vice versa. I'm working on a tiled version now, though, and will see how that goes. ~''''  Contribs