Documents Lecture 4. Big bang, nucleosynthesis, the lives and deaths of stars.

Lecture 4. Big bang, nucleosynthesis, the lives and deaths of stars. reading: Chapter 1 Big Bang Universe began in a tremendous explosion 13.7 ± 0.2 billion years ago. Supported…

Documents Chapter 12

Chapter 12 How the Stars Shine: Cosmic Furnaces Introduction Even though individual stars shine for a relatively long time, they are not eternal. Stars are born out of the…

Documents The Deaths of Stars

The Deaths of Stars What happens when a star uses up all its hydrogen in its core? What is the evidence that stars really evolve? How will the sun die? What happens to an…