Cernan Earth and Sky Show: Galaxies April 23, 2010

'Galaxies' is a multimedia program that combines stars, video, panoramic scenes, planetarium special effects and numerous astronomical photographs taken at some of the world's largest observatories to visually describe the largest building blocks of the universe -- galaxies. Galaxies are gigantic collections of billions of stars, yet most are so distant that the light we see from them has travelled millions of years to reach us. This planetarium program, written by noted author and scientist Timothy Ferris, examines the wonders of our own Milky Way galaxy, including star clusters and nebulae, and then focuses on the more distant and mysterious galaxies that comprise the universe.