Get FREE tickets to the 10/21 Travel Show - use code TSFWP at checkout

Keepers of the night sky

KEEPERS OF THE NIGHT SKY: Dan Duriscoe, left, aims a digital camera at the sky as Night Sky Team colleague Angie Richman confirms its position by computer at Arches National Park, where there is relatively little light pollution.
Don Bartletti / Los Angeles Times
Copyright © 2017, CT Now