A Brief Welcome to the Universe: A Pocket-Sized Tour - Neil Degrasse Tyson

Neil deGrasse Tyson is director of the Hayden Planetarium at the American Museum of Natural History and the author of many books, including Astrophysics for People in a Hurry . Twitter @neiltyson Michael A. Strauss is professor of astrophysical sciences at Princeton University. J. Richard Gott is professor emeritus of astrophysical sciences at Princeton. Twitter @JRichardGott