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Stellar Evolution

By the middle of the 19th century, astronomers and physicists had decided that gravitational energy powered the Sun. In the early 20th century a theory of evolution had been devised with young giants and old main sequence stars, resulting in an age for the earth less than 100 million years. The cries of biologists and geologists were ignored. However physical and astronomical evidence soon built up proving that there was some other Unknown Energy Source! Among all proposals, nuclear fusion eventually won, turning the earlier evolution theory on its head. Today we understand that nuclear fusion has produced the elemental abundances seen today (Carbon and above). With the addition of fusion, we connect stars in different stages of evolution, and understand the various possible ends.

Speaker: Dr. David Dearborn, Lawrence Livermore Labs

Friday, 07/19/19


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Tri-Valley Stargazers

1893 N. Vasco Rd
Unitarian Universalist Church
Livermore, CA 94551