Declination is the angle between an object in the sky and the celestial equator. It is similar to latitude on Earth, measuring how far north or south an object is from this imaginary line. Declination is expressed in degrees, with positive values indicating positions north of the celestial equator and negative values indicating positions to the south. In astronomy, declination is crucial for locating stars, planets, and other celestial bodies. It is used alongside right ascension, which is similar to longitude, to pinpoint the exact position of an object in the night sky. Together, these coordinates help astronomers navigate the vastness of space.