Sunday at 2 p.m. , '' Hayden Planetarium 's 70th Anniversary , '' in Cullman Hall , with a presentation by Neil deGrasse Tyson , the planetarium 's director , and birthday cake ; free with admission .
Neil deGrasse Tyson /business/person/company Hayden Planetarium
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Neil deGrasse Tyson
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Hayden Planetarium
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