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Alpha Centauri Syllabification: Al·pha Cen·tau·ri
Pronunciation: /ˌalfə senˈtôrē/

Definition of Alpha Centauri in English:

The third brightest star in the sky, in the constellation Centaurus, visible only to observers in the southern hemisphere. It is the nearest bright star to the solar system (distance 4.34 light years), and is a visual binary. Also called Rigil Kentaurus.
Definition of Alpha Centauri in:
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