Who Knows: Astronomy Professor George Greenstein and the first photographic evidence of “Extrasolar Planets”

It was a discovery some thought might not occur for decades:  the first photos – blurry yes, but photos nonetheless – of planets orbiting stars other than the sun. Not surprisingly, the discovery has excited the astronomy community around the world. George Greenstein, the Sidney Dillon Professor of Astronomy at Amherst, happens to be teaching a course this semester titled The Unseen Universe. He spoke with Public Affairs Director Peter Rooney recently to offer insight on these no longer unseen planets.