On Sunday night people from North America to Europe, Africa and the Central Pacific will be treated to a rare spectacle - a combination of a 鈥渟uper moon,鈥澨 a 鈥漛lood moon鈥 and a 鈥渨olf moon.鈥 Paul Hayne, an assistant professor of astrophysical and planetary sciences at CU 麻豆影院,听 explains what is so unique about this rare celestial event.