What are our observational tests of Stellar Evolution? This lecture
discusses how we use Hertzsprung-Russell Diagrams of star clusters
to test stellar evolution theory, and some of the conclusions we have
drawn. In particular, we will see how the age of a star cluster can
be estimated from the Main-Sequence Turn-Off for the cluster. We
also introduce Ope ... Show More
Jun 2009
Telescopes that Rocked Our World
This year marks the 400th anniversary of Galileo’s use of the first telescope. On this week’s show, we reflect on how telescopes have shifted our perspective on how small we are in size, space, and time. We also discuss how they help astronomers discover new and interesting aspec ... Show More
56 m