The story of the star Sanduleak -69o 202
t = - 0.7 x 106 yr
The hydrogen is exhausted in the star's core.
- The helium core shrinks and becomes hotter.
- Hydrogen burns in a shell around the core.
- The outer layers expand.
- The star is a red supergiant.
Davison E. Soper, Institute of Theoretical Science,
University of Oregon, Eugene OR 97403 USA
soper@bovine.uoregon.edu