A student of mine wrote me a note on the blank side of a 3x5 index card and she hugged me goodbye. Another went home and built a telescope, and he sent me pictures of the pieces along the way, apart and together like an array of Martian images coming in from the Opportunity in a pixelated panoramic display. I told him about lenses and the human eye, about why stars will always look pointed unless we get close enough to really see them and he said- I’ll try.