39.4 The Evolution and Death of Stars

The Life Cycles of Stars (1 of 3)

Within any star there are two fundamental forces fighting against each other. First, there is the inward pulling force of gravity. Second, there is the outward pushing force resulting from thermonuclear fusion. Duration: 4:26.

The Hertzsprung-Russell Diagram

This lesson explores the relationship between a star's luminosity its surface temperature, which, when correlated together, can be used to deduce the size of the star. Duration: 9:53.

The Life Cycles of Stars (2 of 3)

This lesson follows the projected path of our Sun within the Hertzsprung-Russell diagram as it grows to a red giant and then collapses to a white dwarf. Duration: 7:31.