The Hertzsprung-Russell / Color-Magnitude Diagram

• real data: Hipparchos
• all stars: observer's version (i.e., axes in observational units)
• all stars: theoretical version (i.e., axes in underlying physical units)
• animated HR diagram

Remains of a 1 M_sun star: White Dwarf

• Evidence: Sirius system in X-rays
  within a globular cluster
• Chandrasekhar mass limit
• white dwarf accretion: nova explosion

The Evolution of High Mass Stars

• post-main sequence: supergiants. Beletgeuse HST, more HST, ALMA, interferometry
• stellar structure before explosion

Supernova Explosions

• SN 1994D; Veil nebula: zoom out, in, and further in
• SN1572 (Tycho): X-ray/optical/IR, movie
• SN1054: Chaco Canyon, New Mexico paintings ; Crab nebula optical, movie, from space
• Heavy element synthesis: observed in Cas A; the circle, the circle of life; we are made of star-stuff
• Supernova 1987A
  • before/after
  • HST rings: time evolution
  • neutrinos detected by Kamiokande