Definition of Alpha Centauri in English:

Alpha Centauri

proper noun

Astronomy
  • 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

Pronunciation:

Alpha Centauri

/ˌalfə sɛnˈtɔːrʌɪ/