galactic halo

(redirected from Galaxy halo)
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Related to Galaxy halo: spiral nebula, Halo star

galactic halo

See Galaxy. See also dark halo.

galactic halo

[gə′lak·tik ′hā·lō]
(astronomy)
The spherical distribution of oldest stars that are centered about the galactic center of the Milky Way Galaxy.
References in periodicals archive ?
The material for galaxy halos detected by the CU-Boulder team originally was ejected from galaxies by exploding stars known as supernovae, a product of the star formation process, Stocke of CU-Boulder's astrophysical and planetary sciences department said.
Cosmologists believe these orphaned stars produce the diffuse, blotchy smatterings of light that make up galaxy halos extending well beyond the outer reaches of galaxies.
With the new spectrograph we can see galaxy halos out to at least 150,000 parsecs.