The medium of silverpoint primarily constitutes these drawings, its exactitude and metallic properties an ideal vehicle for the technology and science portrayed. Silverpoint is a pre-Renaissance drawing method in which the artist uses a piece of silver wire to make marks across a specially-prepared gesso, usually applied onto a panel or thick, hot-pressed watercolor paper. With silverpoint, there is very little smudging, blurring, or removal of its hyper-fine lines, and, as such, it is recognized as a rigorous medium to master—another nod to the fastidious, disciplined nature of space exploration and its technology.