The Altitude-Azimuth System is a method used in astronomy to locate objects in the sky. It is based on two coordinates: altitude and azimuth. The altitude measures how high an object is above the horizon, ranging from 0° at the horizon to 90° at the zenith, or directly overhead. The azimuth measures the angle around the horizon, starting from true north and moving clockwise, ranging from 0° to 360°. This system is particularly useful for telescopes and amateur astronomers because it provides a straightforward way to find celestial objects like stars, planets, and constellations. However, it is location-dependent, meaning that the coordinates change based on the observer's position on Earth.