Nova: Invisible Universe (DVD)

25 years ago, NASA launched one of the most ambitious experiments in the history of astronomy: the Hubble Space Telescope. This single telescope has helped astronomers pinpoint the age of the universe, revealed the birthplace of stars, and uncovered black holes lurking at the heart of galaxies. In honor of it's anniversary, NOVA tells the remarkable story that forever changed our understanding of the cosmos and our place in it.