Alpha Centauri A

proper noun

The brightest star in the southern constellation of Centaurus. Alpha Centauri is actually a binary star with Alpha Centauri C or Proxima Centauri as a third component. Alpha Centauri A is the brightest star of the system and is somewhat brighter than our sun. Alpha Centauri B is somewhat fainter than Alpha Centauri A but much brighter than Proxima Centauri.

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Meanings

proper noun

alternative α-Centauri A

  1. astronomyThe brightest star in the southern constellation of Centaurus. Alpha Centauri is actually a binary star with Alpha Centauri C or Proxima Centauri as a third component. Alpha Centauri A is the brightest star of the system and is somewhat brighter than our sun. Alpha Centauri B is somewhat fainter than Alpha Centauri A but much brighter than Proxima Centauri.
Cite this entry
APA

Alpha Centauri A. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Alpha%20Centauri%20A

MLA

“Alpha Centauri A.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Alpha%20Centauri%20A. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Alpha Centauri A,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Alpha%20Centauri%20A.

Source: Alpha Centauri A on Wiktionary, CC BY-SA 4.0.