Astronomy is a subject that covers a wide variety of topics. Although some of the terminology is basic and clear from the start, other words used in the more scientific and theoretical aspects of astronomy are often misunderstood or mixed up. This is why it is vital to own a terminology study guide when learning about astronomy. A subject-specific study guide can help students and those just learning out of personal interest to understand the concepts and can clarify what specific words means. With a study guide as a reference, it is easy to just look up the meaning of a word whenever necessary so no time is wasted and confusion can be avoided.