Artists, like astronauts, are constantly probing into the unknown. It is fitting that, shortly after the establishment of NASA in 1958, the NASA Art Program was created on the principle that artists are uniquely equipped to interpret and document the experience of space exploration. In the program's early years, artists as diverse as Robert Rauschenberg, Andy Warhol, Norman Rockwell, and James Wyeth participated. Over time, the Art Program has commissioned...