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 Robert J. Vanderbei is a professor at Princeton whose books include Sizing Up the Universe: The Cosmos in Perspective (with J. Richard Gott).