the region of dark matter that surrounds the visible portion of a galaxy

A nearly spherical region that surrounds the Milky Way Galaxy and extends some 50,000 light-years from the galactic center.

An enigmatic distribution of older stars that appears key to understanding the formation of our galaxy

A spherical region surrounding the center of a galaxy. This region may extend beyond the luminous boundaries of the galaxy and contain a significant fraction of the galaxy's mass. In terms of cosmological distances, objects in the halo of our galaxy are relatively close.

A spherical region surround the centre of a galaxy. It may extend beyond the visible boundaries of the galaxy and can also contain a significant fraction of the galaxy's mass. Any non-luminous matter within this is known as Dark Matter. The Galactic Halo also contains old stars and Globular Clusters.

A spherical region surrounding the center of a galaxy. This region may extend beyond the luminous boundaries of the galaxy and contain a significant fraction of the galaxy's mass. Compared to cosmological distances, objects in the halo of our galaxy would be very near by.

The region of a galaxy extending far above and below the galatic disk, where globular clusters and other old stars reside.

Spherical regions around spiral galaxies that contain dim stars and globular clusters. The radius of the halo surrounding the Milky Way extends some 50,000 light-years from the galactic center.