Declination
Declination is very much like latitude on the Earth. A Dec of 0 degrees points to the "Celestial Equator" just like a latitude of 0 is at the Equator. Similarly, a Dec of +90 degrees points to the "North Celestial Pole" and -90 degrees points to the "South Celestial Pole." The word Celestial is used to distinguish between, for example, the North Pole in the sky and the North Pole on the Earth. The Celestial Poles lie directly above the Poles on the Earth, so if you were at the North Pole, the North Celestial Pole would be directly overhead. Keep in mind that the places on the so-called Celestial Sphere are directions not positions . Two stars that appear next to each other on the sky may actually be very far apart in reality if one is much further away from the other.