Definition of «halo stars»

Halo stars are a type of star that is located in the halo of our Milky Way galaxy. They are typically older, metal-poor stars that orbit around the galactic center and extend far beyond the visible disk of the galaxy. These stars can provide valuable information about the formation and evolution of our galaxy.

Sentences with «halo stars»

The odd motion marks them as members of the Milky Way's ancient population of halo stars. (newscientist.com)
Extremely scarce in elements heavier than hydrogen and helium («metals»), HE 0107 - 5240 was found as part of a search for metal - poor halo stars in the Hamburg / ESO Survey, which gave it its «HE» designation in combination with its position (see: press releases from ESO and the University of Michigan; and Christlieb et al, 2002). (members.nova.org)
Like other halo stars, it has little iron, because it arose before most of the stellar explosions that spewed the element into space. (sciencemag.org)
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