An Aboriginal tribe's knowledge of the stars, and its culture, stories and music will be explored at the University of Colorado at Boulder's Fiske Planetarium in April. John Stocke, a CU-Boulder professor of astrophysical and planetary sciences, will be joined by Australian storyteller and educator Paul Taylor to present "Aboriginal Skies" on Friday, April 22, at 7:30 p.m., and Saturday, April 23, at 2 p.m.