'Exo!' --1992 "The Year the Milky Way's Planets Came to Life" (VIEW VIDEO)

From Giodarno Bruno's heretical vision of Infinite Worlds in 1593 until 1992, our notion of star-orbiting planets beyond Earth's solar system only existed in science fiction. That's when astronomers Alex Wolszczan and Dale Frail used the 1,000-foot Arecibo radiotelescope to...