Cornell Engineering student Christine Chang ’04, center, and Michel Louge, right, professor of mechanical and aerospace engineering, question Andrew Sternglass, a student at Boynton Middle School in Ithaca, on his vehicle during judging at the annual Junior Solar Sprint, May 22, in Barton Hall. The competition, sponsored, in part, by Cornell's Sibley School of Mechanical and Aerospace Engineering, involves middle-school students from all over central New York, who build and race small solar-powered cars. Cars are judged on design features as well as speed. Due to an absence of consistent sun on race day, this year's competition was held inside, with AA batteries substituting for the solar panels that ordinarily power the cars.