Full speed ahead for cosmic ray project

This is one of many sets of mirrors, covered by protective cloth, being installed in the Black Rock Mesa fluorescence detector building, one of three such facilities under construction as part of the $17 million Telescope Array cosmic ray observatory being built in Utah by scientists from the University of Tokyo, the University of Utah and other institutions. The fluorescence detector mirrors will scan the sky for faint ultraviolet flashes that occur when cosmic rays from space hit nitrogen gas molecules in the atmosphere. Credit: Robert Cady, University of Utah.