His first great discovery was made when he recognized a Cepheid variable star. 他的首次重大发现产生于他认识了一颗造父变星(B-V)的时候。
Magnitude It can be useful, especially for variable star observing, to display the magnitude of stars on the map. 星等在星图上显示恒星的星等是有帮助的,特别是针对变星(B-V)的观测。
The Sun is not considered a variable star, but it does undergo periodic changes in activity known as the sunspot cycle. 太阳是不被认为是变星(B-V),但它的变化进行定期的活动被称为太阳黑子周期。
Young variable star RY Tauri is emerging from a yellowish cocoon of dust near top center. 杨变星(B-V)酵母金牛座正在摆脱黄色蚕茧的尘埃中心附近的顶端。
Welcome to the American Association of Variable Star Observers ( AAVSO ) Nova Search program. 欢迎访问美国变星(B-V)协会新星搜索组。