With Thesis Required courses: 3 of the following four courses (PHYS 8011, PHYS 8101, PHYS 8102, and PHYS 8201), the scientific presentation course (PHYS 8950), and 13 hours of 6000-level and/or 8000-level PHYS or ASTR courses, of which at least 1 of the courses must be at the 8000 level. Research requirement: A thesis must be written and defended to the student's committee. During the last semester (usually the graduating semester), a total of at least 6 hours of PHYS 7000 and PHYS 7300 must be taken. Grade requirement For both MS and Ph.D. degrees, a GPA of 3.0 or better has been maintained in all graduate courses taken. No course with grade below 'C' or lower can be used in the Program of Study.