Books by David Helfand

David Helfand is the former chair of the Department of Astronomy at Columbia University where he has served on the faculty for nearly four decades. He has also been a visiting scientist at the Danish Space Research Institute and the Sackler Distinguished Visiting Astronomer at Cambridge University. He was a founding tutor and served as president and vice chancellor at Quest University Canada; he recently completed a term as president of the American Astronomical Society. He has published commentary in Nature, Physics Today, the Globe and Mail, the Washington Post, and the New York Times, among other publications.