Unlocking Mysteries of our Solar System - Introduction

NASA's Discovery Program sponsors space science investigations that are finding new answers to age-old questions about the origin and evolution of our solar system: Where did we come from? Where are we going? Are we alone? Go along with these robotic missions to explore asteroids, comets, planets and our Sun and moon. How will this information help future astronauts land on an asteroid -- our nation's next great venture into space!