The Dawn Mission is a NASA unmanned space mission that will send an orbiting space probe to examine the asteroids Ceres and Vesta. Dawn will be the first mission to enter into orbit around two different planetary bodies other than the Earth and Moon. The purpose of this video is to deliver an educational video experience about the mission to the general public.
The JPL web site states:
Leonard Nimoy narrates this brilliantly animated 13-minute glimpse of NASA's Dawn mission scheduled to launch in July, 2007. The movie features a look into the planning, instrumentation and technological challenges of this one-of-a kind mission into the heart of the asteroid belt.