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. Straussis professor of astrophysical sciences at Princeton University.J. Richard Gottis prof...

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. Straussis professor of astrophysical sciences at Princeton University.J. Richard Gottis professor emeritus of astrophysical sciences at Princeton. Twitter @JRichardGottRobert J. Vanderbei*is a professor at Princeton whose books include* Sizing Up the Universe: The Cosmos in Perspective * (with J. Richard Gott).