Look. Up in the sky it’s a bird, it’s a plane, it’s a "supermoon" and it’s disappearing. That’s because Sunday evening for the first time in 32 years a "supermoon," a moon that appears larger due to its close orbit to the Earth, and a total lunar eclipse are happening at the same time. But don’t worry about missing it, says Doug Duncan, a CU-Boulder astrophysicist and director of the Fiske Planetarium on campus.