binary star
Astronomy term for a system of two stars orbiting a common center of mass.
連星は、互いの重力で結びついた二つの星からなる。
A binary star consists of two stars bound together by their mutual gravity.
eclipsing variable star
spectroscopic binary
Compound of 連 (ren, 'linked') and 星 (sei, 'star'), literally 'linked stars'.