The study of science branches into the life sciences (biology, zoology, and botany) and the physical sciences (geology, astronomy, chemistry, and physics). In order to understand biology you must understand how matter is put together, that is you must understand chemistry. In order to understand chemistry you must understand the nature of basic things such as motion, forces, energy, matter, light and the inside of atoms, that is you must understand physics. Thus, physics is more than just a part of physical science. It is the basic science. It is about the nature of everything in the universe. It is an organized way of conversing with nature. It is in everything you see, hear, smell, taste and touch. Physics is fun and it offers exciting opportunities for successful and rewarding careers. If you are interested in understanding the way the world works, from the subatomic particles and biological mechanisms to the blueness of the sky and the origin of the universe, then physics is your field.
Astronomy is the oldest science, the most fascinating and beautiful of all the scientific disciplines. It will be difficult for anyone with even the slightest knowledge of astronomy not to be amazed by its richness and history, touched by the profound questions it asks about our place in the universe and humbled by the volume and quality of information it provides us about it. From the first questions asked by the earliest civilizations about celestial events to the modern descriptions of exotic phenomena at the edge of the observable universe and our current and future efforts to explore our surroundings and communicate with others beyond our solar system, astronomy was, is and will be an integral part of human life. It has touched all aspects of human activity, from poetry and philosophy to politics and technology. It gives us a way of looking at and understanding the universe and thus a way of understanding our position in it.