eclipsing binary

…It is also called an eclipsing binary. When viewed through a telescope, it appears to be a single star, but when its brightness is measured, it periodically dims, and when the shape of the light curve indicates that the dimming is due to an eclipse of a binary system made up of two stars, it is called an eclipsing variable.

*Some of the terminology explanations that mention "eclipsing binary" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…食連星eclipsing binaryともいう。望遠鏡で見ただけでは一つの恒星だが，明るさを測っていくと周期的に減光し，その光度曲線の形から二つの星からなる連星の食現象による減光であることがわかる場合，食変光星という。…

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出典｜株式会社平凡社世界大百科事典 第２版について | 情報