The HR Diagram is used to provide a categorization of stars based upon their temperature and luminosity. When plotted, very distinct regions become apparent. In the series on the HR Diagram, this video will focus on the Main Sequence. This is where stars will spend most of their life.
The definition of Main Sequence is a star fusing Hydrogen into Helium in its core. Once Helium fusion begins, the star leaves the Main Sequence.
Stellar Death Low Mass Stars
Previous lessons have outlined stellar evolution to Helium fusion.The lifecycle after Helium fusion depends on a star’s mass. The image to the right shows the varying layers of fusion that a star can attain depending on its mass. NOTE: Many of today’s images will come...