galactic coordinate system

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Related to Plane of the Milky Way: Galactic plane, plane earth

galactic coordinate system

n.
A celestial coordinate system in which an object's position on the celestial sphere is defined relative to the plane of the Milky Way galaxy and the two poles formed by a line through the center of the galaxy perpendicular to the plane.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Caption: HIDING IN PLAIN SIGHT In this all-sky view of nearby galaxies, the plane of the Milky Way (gray) is almost directly perpendicular to the supergalactic plane, which extends from left to right.
Studying the edge of the galaxy is difficult, Blitz says, because the thick screen of dust in the plane of the Milky Way blocks a lot of the light from distant stars.
(This was the first application of statistical methods to astronomy.) He found that the number of stars per unit area of sky rose steadily as one approached the Milky Way, was maximal in the plane of the Milky Way, and minimal in the direction at right angles to that plane.
In "Herschel's Ghosts" (page 30), amateur astronomer Mel Bartels focuses on the nebulous streamers of gas and dust that extend far above and below the plane of the Milky Way disk.
HIP 13044 and the other stars in the Helmi stream stand out because their elongated orbits take them about 42,000 light-years above and below the plane of the Milky Way's disk.