Daily. Three different audiovisual planetarium shows suitable for all ages. Expedition Reef (11:30 a.m.) reveals the secrets of coral reefs, the “rainforests of the sea” that are the Earth’s most vibrant and endangered marine ecosystems. The Sky Tonight (12:30 & 2:30 p.m.) is an exploration of the current night sky, with tips on how to find the cardinal directions, constellations, and planets on your own. Tales of the Maya Skies (1:30 p.m.) immerses viewers in the wonders of Mayan science, examining how Mayan scholars developed a sophisticated understanding of astronomy, architecture, and mathematics that enabled them to predict solstices, solar eclipses, weather patterns, and planetary movements. Various times, MNH, 1105 North University. $8. Limited capacity. 764–0478.