Corkscrew Meteor Mystery While photographing the recently discovered comet Machholz the other night, Jimmy Westlake's mind wandered back to a mystery that'd been bugging him for years. On Jan. 1, 1986, he was photographing another comet, Halley's, through his homemade 8-inch reflecting telescope. "About one minute into the exposure, I watched a meteor zip through the field of the telescope," said Westlake, a professor of physical sciences at Colorado Mountain College in Steamboat Springs, CO. "I stopped the exposure at two minutes." That night, when he developed the roll of slide film, he was astounded at what he saw: "Crossing...