The Alpha Centauri A/B system is an example of a binary star system, where both celestial objects orbit around one another, held together by their mutual gravity.
ALPHA CENTAURI A INFORMATION
Alpha Centauri A is the third brightest star in the night sky, and the brightest of the Southern constellation Centaurus. It is approximately 1.34 parsecs (or 4.37 light years / 26 trillion miles) from Earth. It is part of a binary star system, along with Alpha Centauri B, a cooler star. Alpha Centauri A also is known as Rigil Kentaurus, Rigil Kent or Toliman. It is classified in astronomy as a G2 White Dwarf, and is similar in size, color, mass, luminosity and temperature to the Sun.