The Program Physics is the study of the most basic laws that govern our universe. The major branches of classical physics are motion, heat, sound, electricity, magnetism and light. Typical introductory courses also touch on some areas of modern physics such as quantum theory and relativity. Studying physics will enable you to see the world around you with new insight and understanding.
Astronomy is actually an area of specialization within physics.
Many colleges and universities don't offer an undergraduate program in astronomy, only a graduate program. Because the laws that govern the physical universe are mathematical, students majoring in physics or astronomy need to enjoy mathematics and do well at it. The study of physics will provide students with an excellent foundation for understanding the universe around us, and also the critical problem solving skills that are necessary in many areas of study. For research positions and for college and university teaching, the Ph.D. degree is generally required. With only a bachelor's degree you are quite likely to work in a related area which draws on your unique knowledge and analytical skills.