Galactic halo
The term galactic halo denotes a component of spiral galaxies, including our galaxy, the Milky Way, which extends further out than the disk, which is the most visible part of a spiral galaxy.
GALACTIC HALO - Spherical region around a spiral galaxy that contains dim stars and globular clusters. The radius of the Milky Way's halo extends ~50 kpc from the galactic center (Earth is at ~28 kpc in the galactic disk).
galactic halo Region of a galaxy extending far above and below the galactic disk, where globular clusters and other old stars reside.
Galactic Halo
(a) A spherical aggregation of stars, globular star clusters, and thin gas clouds, centered on the nucleus of the galaxy and extending beyond the known extremities of the galactic disk.
galactic halo
The circular region surrounding the disk of a spiral galaxy. The halo is thin and is composed mostly of old globular clusters.
Galactic Halo
the name given to the spherical region surrounding the center, or nucleus of a galaxy.
Galactic Halo - The roughly spherical outermost component of the Milky Way, reaching to at least 30 to 40 kiloparsecs (kpc) from the center
Galactic Latitude - The angular distance of a body above or below the galactic equator ...
galactic halo
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.
The Galactic Halo extends outward, but is limited in size by the orbits of two Milky Way satellites, the Large and the Small Magellanic Clouds, whose perigalacticon is at ~180,000 ly (1.7Ã-1018 km).
3. The Galactic halo contains about as much gas and dust as the Galactic disk. (Hint)
4. The Galactic disk contains only old stars. (Hint)
5. Population I objects are found only in the Galactic halo. (Hint) ...
THE OUTER GALACTIC HALO
As noted earlier, halo globulars exist much further from the galactic center than the Sun's position.
galactic halos (NASA Thesaurus) The tenuous, spherical cloud surrounding spiral galaxies. It is the locus of old stars and globular clusters. Halos appear to be required, at least to some extent, for the stability of disk galaxies.
The nature of dark matter in the galactic halo of spiral galaxies is still undetermined, but the most popular theories are that the dark halo is home to vast numbers of small bodies known as MACHOs and/or weakly-interacting particles known as WIMPs.
This is the galactic halo. Its existence is known through two effects: the observation of old, high-velocity stars that are passing through the galactic plane, ...
Most of the stars in the central bulge and in the globular clusters of the galactic halo are old, low metals stars, and halo stars account for only 0.1 to 0.2 percent of the stars near Sol.
BREAKOUT BUBBLE - Galactic feature produced when hot young stars and supernovae punch holes or blow bubbles in the surrounding gas, and the diffuse hot component escapes the disk into the galactic halo through buoyancy.
Originally thought to be old galactic halo Population II subdwarfs, the two stars are now thought to be younger galactic disk stars, but still considerably older than the Sun, perhaps as much as 8 billion years old.
Some similarity is found with the hot ISM in our galactic halo, but we sample different regions for these kinds of observations and the ionization match is still poor.
Recent X-ray observations have confirmed that galactic halos contain hot gas, gas with temperatures of millions of degrees.
Morris, Cosmic Questions: Galactic Halos, Cold Dark Matter and the End of Time (1995); T. Van Flandern, Dark Matter, Missing Planets, and New Comets (2d ed. 1998); M.
Surrounding the whole system, and outside the plane of the disk is the galactic halo. This is where the globular clusters live. As we have discussed previously, the globular clusters are composed of old Population II (metal poor) stars.
Stars in the galactic halo and in globular clusters tend to be metal-poor, and probably formed very early in our galaxy's life, out of the primordial gas.
First of all, globular clusters do not lie within our galaxy, but rather on the outskirts of it, forming a "galactic halo." Our Milky Way galaxy has 150 known globular clusters. Other galaxies can also have globular clusters, though it is not a rule.
The disk and the bulge are surrounded by the galactic halo, which is spherical and even larger than the galactic disk. The halo consists of old stars, some in the globular clusters, and interstellar matter.
Massive Compact Halo Objects. Low-luminosity objects such as planets and brown dwarfs which contribute to the mass of the galactic halo.
Magellanic clouds
Small, irregular galaxies that are companions to the Milky Way. Visible in the southern sky.
Dwarf Galaxy: Small, low luminosity galaxies that are associated with larger spiral galaxies and may make up part of a galactic halo.
Population II stars are older, red stars with lower metallicities and are typically located in globular clusters in galactic halos, in elliptical galaxies and near the galactic centre of spiral galaxies.
in one or possibly two molecular clouds which are associated with the high latitude galactic infrared cirrus. The finding is significant because they may represent the birth places for the Population I metallicity B-type stars in the galactic halo ...
 See also: Halo, Galaxy, Mass, Milky Way, Light
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