Virtual Reality Moon Phase Pictures These Virtual Reality Moon Phases were created by R. Schmidt from ray-traced images of the Moon. A Clementine spacecraft mosaic of the lunar surface was mapped onto a sphere, and scenes were rendered as a virtual Sun orbited the Moon. The depiction of lunar surface features suffers geometric distortion but the terminator is correct with respect to the ...

Once in a Blue Moon ...

Provides a slide rule moon phase calendar and other methods of computing astronomical information ...