半人马座（Centaurus）是一个巨大的明亮星座，它拥有两颗一等大星，半人马座α星和半人马座β星。半人马座区域内有各种令人感兴趣的天体。

天空中有两个半人半马的形象，半人马座是其中之一（另一个是人马座）。在希腊神话中，半人马是一种奔跑迅速，武艺高强的生物，形象可怕，举止粗鲁，好色贪杯。他们当中也有例外，例如半人马奇戎是多位希腊英雄的导师，当中包括阿斯克勒庇奥斯、忒修斯、阿基里斯、伊阿宋及海格力斯。

Centaurus /sɛnˈtɔːrəs/ is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. In Greek mythology, Centaurus represents a centaur; a creature that is half human, half horse (another constellation named after a centaur is one from the zodiac: Sagittarius). Notable stars include Alpha Centauri, the nearest star system to the Solar System, its neighbour in the sky Beta Centauri, and V766 Centauri, one of the largest stars yet discovered. The constellation also contains Omega Centauri, the brightest globular cluster as visible from Earth and one of the largest known.