Season 4, Episode 7 The Search for Cosmic Clusters
First Aired: September 29, 2009
A study of star clusters focuses on two types, open and globular, and what they reveal about the nature of stars and galaxies; and also what they show about the universe, specifically its expansion.
Cast & Details See all »
- Premiered: May 29, 2007
- Rating: TV-PG
- Premise: An astronomy series examing the history, scientific phenomena and mysteries of the universe. (more)