Examine the stages a massive star—one with 8 or more times the mass of our sun—goes through as it begins to run out of hydrogen in its core.

  !   Click the With Labels or Without Labels buttons to see an animation of diagrams that represent the life stages of massive stars. Use the movie controls to examine different parts of the sequence and read the text associated with each stage.

3. After a massive star's hydrogen is depleted in the core, what does it use for nuclear fuel?

4. Describe the final form of matter for large stars.