With the lights of downtown Hilo in background, Janice Harvey, center, education and outreach specialist for Gemini Observatory, shows Haili Christian sixth-graders, from left, Nicole Smallwood, Jarred Kurokawa, Cheyrub Cabarloc and Railee Rosete a star chart to indicate which constellations should be visible in the night sky. Thirteen students and their teacher met with Harvey Tuesday evening at the Bayfront soccer fields to measure light pollution in the Hilo skies.