equatorial system

The equatorial system is a coordinate framework used by astronomers to locate objects in the sky. It is based on the celestial equator, which is an imaginary line projection of Earth's equator onto the sky, and the celestial poles, aligned with Earth's rotational axis. Objects are specified using two measurements: right ascension (like longitude) and declination (like latitude). This system helps astronomers track and find stars, planets, and other celestial objects regardless of Earth's position, providing a consistent way to map the night sky from any location on Earth.