We were both headed to seeRobin Cameron’s exhibit Memory Palace. I was walking, you were riding your bike. We had apparently chosen the same route, only different methods of transportation. I had turned around halfway because a few seconds earlier I realized that it was Sunday, not Saturday, and the gallery would be closed. As I turned, we crossed paths–you headed where I was just a few seconds ago. Now that I was turned in the direction of my house, changing directions again seemed like too much change for one day. You continued on, risking the possibility that you would show up and there would be no one to let you in, but there was. You saw the exhibition that day, a Sunday. I did not. You sent me a picture of the show and I regretted not turning a second time, back in the direction of the destination I never made it to.
“Science does not have a monopoly on empiricism,” historian David Topper once noted, arguing that empirical matters are, in fact, “germane to all visual imagery.” (1) Recognizing the role of visual images in the production of theoretical knowledge means understanding that their value extends beyond mute illustration to their unique capacity for discovering and articulating new information. An elegant case in point is trigonometric parallax—the “gold standard” of geometric measurements—first developed by Hipparchus (190-120 BCE), and still used by today’s astronomers for determining the moving edge of our expanding universe. (2) Whereas distance measures the spatial difference of two points, parallax derives distance through the mediation of a third: observing a distant object while alternating between two lines of sight, one can measure the apparent shift in an object’s location. Read More