Any extra graphics would be great to have. We could re-use the original 'storm' bmp images for milder nebulas where normal stars and planets exist but just happen to be in a cloud of interstellar gas and dust. I think some of these 'real' nebula images are not really suitable as "system" images because they don't fill the space, but that's for each individual user to decide. They are all quite impressive to look at, though. If you don't have the disk space, don't download them.
Now, with all these nebulas (erm, nebulae?) we need more graphics of other sorts. Can we shanghai^H^H^H^H^H^H^H^H^H persuade someone with a bit of graphical artist skill to make us some more stars? A few stars with obvious flares shooting on them would be good for scenario makers, as I suggested before. A 'neutron star' or 'pulsar' image would be nice to have. I know it's really a tiny little point in space that gives off mainly invisible radiations but for the purposes of the game a small star with a weird 'radiation' glow to it (a halo or haze around it) would be a cool pulsar. The system with the pulsar could have extreme combat sensor interference and shield reduction like a black hole. And maybe some single images of small binaries would be cool. Two very small red stars could orbit so closely that they reasonably fit into a single sector.
And then there are comets, as I suggested. I've also been thinking that we could make a large 'asteroid' image and make it a planet type so colonization of large asteroid would be possible just like airless planets. Problem is, stellar manipulation would think it was a planet.