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galactic halo
(redirected from Galaxy halo)

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galactic halo

In astronomy, a nearly spherical volume of thinly scattered stars, globular clusters, and tenuous gas observed surrounding spiral galaxies. It may extend far beyond the disk and contain most of the galaxy's mass. The halo of the Milky Way Galaxy is thought to have a radius greater than 100,000 light-years and to be predominantly composed of dark matter.

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.
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This indicates to astronomers how the surrounding environment influenced the formation of galaxy halos in the early Universe.
Hubble spots swirling dust lanes in oddball galaxy by Asian News International
 
 
 
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