Gravitational Lensing
		Einstein's General Theory of Relativity demonstrates that a large mass can deform spacetime and bend the path of light. So, a very massive object, such as a cluster... http://www.kwakkelflap.com/files/gravlens.zip - 74KB - Download - Screenshot

		Stars and Galaxies in 3D
		Real stars and galaxies in 3D and full color. Move and look in any direction. Easy to use with keyboard shortcuts and presets. 9,000 stars (all visible stars,... http://www2.netdoor.com/~jeffrgrs/sg3d210.zip - 1.27MB - Download - Screenshot