Description: The zenith angle is defined as the angle formed between the line of sight to an object and the vertical line extending from the observer to the zenith, the highest point in the sky directly above the head. This concept is fundamental in various disciplines, including astronomy, geodesy, and navigation. In simple terms, a zenith angle of 0 degrees indicates that the observed object is directly overhead, while a 90-degree angle means the object is at the horizon. Measuring the zenith angle allows scientists and technicians to calculate positions and distances in space as well as determine the altitude of an object in relation to the observer. Its relevance extends to satellite planning, astronomical observation, and navigation, where precision in angle measurement is crucial for obtaining accurate results. In summary, the zenith angle is an essential tool for understanding and measuring the position of objects in three-dimensional space, facilitating a variety of technological and scientific applications.