Powerful telescopes on Earth and in orbit are producing thousands of images of stars and galaxies, so many there aren’t enough professional astronomers to interpret them all. You would think they’d turn to computers, but it turns out that the human eye is actually better at detecting minute differences between one photo and the next. At the Adler Planetarium in Chicago, "citizen scientists" are providing important research assistance, not just on faraway galaxies but on the Moon as well. Geza Gyuk is Director of Astronomy at the Adler.