Since the dawn of humanity, comets have inspired both fear and wonder. During the past 30 years, a number of spacecraft have zipped past comets, so shrouds of mystery surrounding these “dirty snowballs” are slowly being lifted. Joseph Veverka, professor of astronomy at Cornell University, has led several of these missions. He will discuss how our understanding of these so-called leftovers from the origins of the solar system have changed over time. How did comets and our solar system form? Did comets deliver most of the water and the building blocks of life to our infant planet? Perhaps most intriguing: Are we all made of comet stuff? Enjoy an evening of exploration with this world leader in planetary science.