galactic longitude

American  

noun

Astronomy.

1. the angular distance in degrees measured eastward in the galactic plane from a radius drawn from the earth as center to the constellation Sagittarius.

---

Etymology

Origin of galactic longitude

First recorded in 1910–15

Example Sentences

Adopting, the additional computative burden imposed by it notwithstanding, Schonfeld's modification of Airy's formul�, he introduced into his equations a fifth unknown quantity expressive of a possible stellar drift in galactic longitude.

From Scientific American Supplement, No. 829, November 21, 1891 by Various

The fourth column gives the galactic square, the fifth and sixth columns the galactic longitude and latitude.

From Lectures on Stellar Statistics by Charlier, Carl Vilhelm Ludvig

Instead of giving the galactic longitude and latitude of a star we may content ourselves with giving the galactic square in which the star is situated.

From Lectures on Stellar Statistics by Charlier, Carl Vilhelm Ludvig