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Astronomy Unit Name:   Astronomy Chair of Department:   Richard M. Crutcher Department Office:   103 Astronomy Building, 1002 West Green, Urbana, 333-3090 If you have questions about these classes or their descriptions, please contact the department or unit listed above. See the Courses Catalog Index for more information on the Catalog. ASTR 100.   Perspectives in Astronomy ASTR 113.   The Sky ASTR 121.   The Solar System ASTR 122.   Stars and Galaxies ASTR 131.   The Solar System Lab ASTR 132.   Stars and Galaxies Lab ASTR 199.   Undergraduate Open Seminar ASTR 210.   General Astronomy ASTR 230.   Extraterrestrial Life ASTR 250.   Introduction to Cosmology ASTR 290.   Individual Study ASTR 301.   Scientific Writing for Astronomers ASTR 304.   Astrophysics ASTR 305.   The Solar System and the Interstellar Medium ASTR 306.   Galaxies and the Universe ASTR 314.   Astronomical Techniques ASTR 350.   Introduction to Geophysics ASTR 396.   Seminar in Astronomy ASTR 402.   Theoretical Astrophysics I: Diffuse Matter Dynamics ASTR 403.   Observational Astronomy ASTR 404.   Theoretical Astrophysics II: Stellar Physics ASTR 406.   The Physics of Compact Objects ASTR 425.   General Relativity ASTR 426.   Applications of General Relativity ASTR 490.   Individual Study ASTR 496.   Seminar in Special Topics ASTR 499.   Thesis Research