I scanned and digitized two-hundred-forty-seven glass projection slides from the Planetarium at City College in New York City. Many were over 100 years old: the Moon, Saturn, comets, telescopes. They were all shot on film. The slides were a look at the night sky before digital’s clarity, and some of them took my breath away with their texture and tones. But for me, these objects signified impermanence and obsolescence. Science and technology from not long ago had transformed into small historical relics that you could hold in your hand —Art. If we were gone and they were found, I wonder what they would transmit.