Chief Scientist of NASA's Goddard Space Flight Center, Dr. Jim Garvin, takes us on a journey of Earth, the moon, and our neighboring planets. Why does space matter? Why is exploring the inner solar system so crucial? Where will humans venture to next? In this video lecture, Dr. Garvin answers these questions and discusses NASA's past, present, and future of discovery on our nearest neighbors in the solar system.This video can also be downloaded at:http://svsdev.gsfc.nasa.gov/vis/a010000/a010600/a010618/To learn more about NASA missions and science, visit our homepage, www.nasa.gov.