re: planetarium projection
As you know, I've printed out some of your panoramas on my plotter. The longest one I printed was about four feet long and I could bend it into a cylinder and stick my head inside. That's still pretty tight and I have resisted printing (due to cost) anything bigger to try see if it improves the viewing. The recent panorama from Spirit is a huge download (even on broadband) but it'd make a nice huge poster.