Analemmatic Sundial

John O'Brien (lead artist)

2008. California Institute of Technology (Caltech). Photographed by Robert Wedemeyer. Images courtesy of John O'Brien.

When an observer steps onto the embedded rectangular plinth, the sundial uses the standing person as the gnomon (casting the shadow) to tell the time. It becomes an interactive piece of art and reminds the observer (in their role as human gnomon) not only of where, but when, they stand. The work was created in collaboration with scientists from the Caltech Alumni Association.

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