Astrophysics (Index)About

north galactic pole

(determination of the more northern direction of the Milky Way's axis)

The north galactic pole is the point in the celestial sphere in a direction parallel to the Milky Way's axis (specifically, perpendicular to the galactic plane), specifically the direction along such a line closer to the Earth's north pole, so it has a positive declination. While this depends upon definition of the galactic plane as well as observation/analysis, a standard has been adopted by the IAU for general use. The other galactic pole (the south galactic pole) is in the opposite direction, i.e., subtracting 12 hours from the right ascension and negating the declination.

(Milky Way,coordinates,celestial sphere)
Further reading:
Coordinates:north galactic pole