You are here: 

Dr. Alice Christie's GEOPA PROJECT PILOT Lesson 3: Works by Joseph McShane

Origins

 

Origin, located at the :  Tech Museum of Innovation in San José, CA, is made of several integral components. A gilded, nine-foot diameter tower rises 45’ from the floor, as seen from above in this picture. Natural granite boulders placed within the floor space provide informal seating.

McShane

 

Joe McShane adjusts Payload G-38's control system before final assembly and launch (photo by Charles Lyon)

Payload

 

Payload G-38 after returning from space (photo by Charles Lyon)

 

G-38 contained a clear glass globe about 14 inches in diameter, fitted with a flexible stainless-steel tube and a valve. It left the Earth filled with 22 liters of sea-level air at sea-level pressure. In orbit, the valve was opened for several days by the payload's control system to establish equilibrium between the globe and its environment. The sphere came back to Earth with 22 liters of ultra-thin upper atmosphere. Now permanently sealed, it is attached to a vacuum gauge with digital readout. The gauge is sensitive enough to show moment-to-moment changes in the pressure-difference between the space vacuum inside and the atmosphere outside pressing against the sphere.