老人星(α Car / 船底座α)亦叫南极老人星,寿星,是船底座主星,在中国传统天文系统里是位于井宿的老人星官里唯一肉眼可见的恒星。虽然老人星距离地球超过300光年,不过视星等为−0.72等,是南半球船底座最明亮的恒星,也是全天空中第二亮的恒星,仅次于天狼星。而它实际的绝对星等则为−5.53等。
英语百科
Canopus 老人星
Canopus (/kəˈnoʊpəs/; αCar, αCarinae, AlphaCarinae) is the brightest star in the southern constellation of Carina, and the second brightest star in the night-time sky, after Sirius. Canopus's visual magnitude is −0.72, and it has an absolute magnitude of −5.65.
近义、反义、联想词
近义词
n.
supergiant
英英词典
canopus n.
supergiant star 650 light years from Earth; second brightest star in the sky