An Educator Shines At the Planetarium

If any students from the Astrophysics 203 class at Princeton University had sneaked into last week's preview of New York's renovated Hayden Planeterium, they would have seen their professor, Neil de Grasse Tyson, fielding questions from a clutch of people.

Standing by the Willamette meteorite—the only stone left unturned in the total revamping—Dr. Tyson, the planetarium director, conducted an impromptu class about...

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