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galactic halo
(redirected from Halo star)

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galactic halo

In astronomy, outer, sparsely populated region of a galaxy, roughly spherical in shape and extending far beyond the bulk of the visible stars. In our own Galaxy, the halo contains the globular clusters, and may harbour large quantities of dark matter.



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The relative youth of many of Andromeda's halo stars suggests that an intruder crashed into the galaxy some 8 billion years ago, hurling young stars from Andromeda's central disk into the halo.
Image reveals galaxy's violent past. (Starry View) by Cowen, R. / Science News
Already studying a larger catalog of halo stars, Timothy C.
Star streams reveal galaxy's dining habits by Cowen, R. / Science News
In a new study analyzing highly accurate measurements of the position and velocity of 41 halo stars near the sun, B.
Hipparcos finds hint of star streams by Cowen, R. / Science News
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