Astrophysics I Credit Hours: 3 hours. Stellar astrophysics, stellar structure and atmospheres, formation of spectral lines and spectral classification, stellar evolution from star formation to planetary nebulae and supernovae and the resulting compact objects. Offered spring semester every odd-numbered year. Prerequisites: ASTR 1110 and ASTR 1120 and PHYS 3700 and PHYS 3900 Prerequisite or Corequisite: PHYS 4101/6101 Semester Offered: Spring Level: Graduate Undergraduate