AST 1002 - Descriptive Astronomy AST 1002 - Descriptive Astronomy 3 cr. hrs. This course provides a comprehensive look at modern astronomy emphasizing the use of the scientific method and the application of physical laws to understand the Universe including Earth and its environment. Throughout this course, you will develop the ability to discern scientific knowledge from non-scientific claims by using critical thinking. Course Designations: (CORE) (GE) (TR)