"I work with light in much the same way a musician uses sound." – Peter Aldridge. The astrolabe is an ancient astronomical instrument used for solving problems relating to time and to the position of the sun and other stars in the sky. It was used by astronomers, navigators, and astrologers. It was also used for surveying and triangulation. This astrolabe is symbolic rather than functional. Aldridge’s sculptures may be seen as instruments that rearrange energies in the environment, and their function is metaphysical rather than technical.