The Equatorial System is a celestial coordinate system used to locate stars and other celestial objects in the sky. It is based on the Earth's rotation and uses two main coordinates: right ascension and declination. Right ascension is similar to longitude on Earth, while declination is akin to latitude, allowing astronomers to pinpoint the position of objects relative to the celestial equator. This system is particularly useful for astronomers because it remains fixed relative to the stars, unlike the horizon-based systems that change with the observer's location. The celestial equator divides the sky into northern and southern hemispheres, making it easier to navigate and study the universe.