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physical object > natural object > celestial body > star > Population II star > field horizontal branch star

field horizontal branch star comparison table

Subject	is a kind of	has spectral type	has definition
Population II star	star		Older stars, generally formed towards the centre of a galaxy, containing few heavier elements. The brightest of this Population are red giants.
field horizontal branch star	Population II star	B star or A star	High-velocity metal-weak star of either B or A spectral type.

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