Secrets of Deep Sky Observing

We've figured out all sorts of ways to get the faintest and the mostest out of CCD chips, DSLRs, and videocams. But what about your eye? Are you sure you know all the tricks? Why your daytime glasses matter, why to hug your trees, why the universe yellows as you age -- and do bilberries really work? Come rouse your rhodopsin with Alan MacRobert, senior editor at Sky & Telescope.