Relating to a galaxy or galaxies, especially the galaxy containing the solar system
= lactic acid.
The Milky Way.
(Originally) the disc of the galaxy, as represented in the sky by the Milky Way; (later also) the relatively thin, disc-shaped outer part of any spiral galaxy.
A roughly spheroidal part of many spiral galaxies that surrounds the disc and the bulge and is more diffuse, containing stars that are older; specifically that of the galaxy to which the solar system belongs, which contains stars and globular clusters.
Either of the two opposite points of the sky situated at 90 degrees north and south of the galactic equator.
An outward flow of hot gas from a galaxy following an event such as a period of star formation or the outburst of a supernova.
The central point or zone of the galaxy.
The central line or zone of the Milky Way across the sky; specifically = galactic equator.
Unidentified radio-frequency radiation coming from beyond the solar system
The plane defined by the galactic equator.
The system of galactic coordinates.
The cluster of stars including the sun and the Milky Way (now disused).
The latitude of a point on the sky measured from the galactic equator.
The longitude of a point on the sky measured from a reference point on the galactic equator, usually defined either by the direction of the centre of the galaxy or by the intersection of the galactic and celestial equators.
The central part of a galaxy; specifically that of the Milky Way galaxy.
The great circle of the celestial sphere passing as closely as possible through the densest parts of the Milky Way
The process by which a galaxy attracts matter from a neighbouring galaxy by gravitation, growing at its expense.
A tendency for stars (or other celestial objects) to occur in greater abundance closer to the galactic equator.
Either of a pair of coordinates comprising respectively galactic latitude and longitude.
A compact region at the centre of a galaxy which emits an abnormally large amount of radiation in one or more parts of the electromagnetic spectrum.
Situated, occurring, or originating outside the Milky Way galaxy
Relating to, moving, or situated between two or more galaxies