It's Not Your Grandpa's Planetarium Anymore

Nearly three thousand planetariums dot the U.S. terrestrial landscape, featuring celestial shows about stars, planets, solar systems and galaxies, often projected onto an overhead dome-shaped screen by a technology that hasn't changed much since it was introduced in 1923: the "star ball."

Source: http://www.technewsworld.com/rsstory/71409.html

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