Navajo star and constellation myths, including the Navajo story of how the stars were created, will be the subject of the next live astronomy presentation or “star talk” at Fiske Planetarium on the campus of the University of Colorado at Boulder. “Navajo Skies” will be presented by CU astronomer John Stocke at 7:30 p.m., Friday, March 6, and repeated at 7 p.m., Wednesday, March 11.