a 4-projector system that displays images on a spherical screen. the Science on a Sphere system can display & animate vast amounts of visual data from the Earth, Moon, Sun & the other planets. the sphere is suspended by thin wires, so that animating the image data gives the illusion of a free-floating, rotating world.
see also 3d display & pyrotechnic display.
[noaa.gov & nytimes.com & noaa.gov(mov)|via slashdot.org]