A galactic bulge is a centrally concentrated stellar population in a galaxy, usually thicker than its disk. Its origin, rotation and random stellar motions can differ from those of the disk; bulge light is often described by a Sérsic profile.
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The galactic bulge is the dense, central region of a galaxy, particularly prominent in spiral galaxies. It is characterized by a concentration of stars, gas, and dust, often forming a rounded or spheroidal shape. The bulge typically contains older stars, as well as a higher density of stars compared to the surrounding disk of the galaxy.