These paperweights show two different hemispheres of the moon; one the side visible from earth; the other the hidden side. A bottom is provided which can be glued on after filling with weights. Alternately the two halves can be glued together to make a complete moon. The data comes from NASA's Lunar Reconnaissance Orbiter (LRO). The files were created using the program "globe" by DJ Moews available at: http://djm.cc/dmoews.html. See note. Two hundred post 1982 zinc pennies, which weight about half a kilogram, can be contained in each paper weight.