Talking with Pioneering Planet Hunter, 20 Years After Groundbreaking Find

It's been 20 years since scientists first announced the discovery of a planet outside Earth's solar system orbiting a sunlike star. Since then, the study of exoplanets has grown dramatically. Space.com caught up with Michel Mayor, professor emeritus at the University of Geneva and the Geneva Observatory, to discuss how the understanding of exoplanets has evolved over the last two decades.