MOUNTAIN VIEW, Calif.--Commercial space entrepreneurs are developing rockets to take tourists to the moon someday. But a software maker has gotten a head start on the adventure by simulating a lunar ride for the PC user. Virtue Arts, based in Los Angeles, has developed software that renders the exact physics and topology of the moon in a 3D game, letting players drive the lunar surface, gaze at the galaxy or study objects that were left by NASA astronauts on real missions. Virtue Arts The company showed off its application for the first time Thursday here at NASA Ames Research Center....