[Fnordianslip]

Looks pretty good to me. The only real color coding scheme that I think would be nice would be the orbital radius habitability zones. Otherwise, I don't think more colors would add much to it. If you do add one more narrow column, density would be a fine choice. That would give a general idea of the mineral wealth available. Not a huge thing, but meaningful in most of the space games I've played. Once again, fantastic work!