The great circle of the celestial sphere that lies in the plane bisecting the band of the Milky Way galaxy, inclined at an angle of approximately 62° to the celestial equator.
Galactic-equator Sentence Examples
On these the belt of greatest density can be easily traced, and it follows very closely the course of the Milky Way; but, whereas the latter is a belt having rather sharply defined boundaries, the star-density decreases gradually and continuously from the galactic equator to the galactic poles.
According to their results the star-density increases continuously from 109 per square degree at the poles to 2019 along the galactic equator.
The Pencil Nebula is almost exactly on the galactic equator.
On the 21st of December 2012, the Earth will be at the Galactic Equator.