The Teaching Company, the Great Courses. Complete Set:"understanding the Universe: An Introduction to Astronomy Video Series (TEACHING THAT ENGAGES THE MIND COURSE # 181-184 UNLOCKING THE SECRETS OF THE HEAVENS. STARS AND THEIR LIVES,A UNIVERSE OF GALAXIES, THE BIRTH & LIFE OF THE UNIVERSE, PART1 THROUGH PART FIVE. 15 VHS TAPES & 5 COURSE GUIDEBOOKS)