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galactic halo

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.03 sec.
galactic halo
n
(Astronomy) Astronomy a spheroidal aggregation of globular clusters, individual stars, dust, and gas that surrounds the Galaxy
galactic halo
A large, spherical region of relatively dust-free space surrounding a spiral galaxy such as the Milky Way. The inner regions of the galactic halo contain globular clusters of very old stars, while the outer regions are apparently occupied by large amounts of dark matter. See also MACHO.


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This adds a nice example in the local universe to the growing evidence that galactic halos are built up from the accretion of dwarf satellite galaxies," says study coauthor Eric Peng of the Johns Hopkins University in Baltimore.
Galactic cannibalism strikes again. (Astronomy) by Science News
This type of particle might inhabit a spherical region known as the galactic halo, encompassing our galaxy.
Letters by Science News
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