noun
multiple star
Astronomical term for a system of two or more stars that appear close together from Earth, either physically bound or an optical double.
重星は、肉眼では一つの星に見えることが多い。
Multiple stars often appear as a single star to the naked eye.
この重星系は、互いの重力で結びついている。
This multiple star system is bound together by mutual gravity.
Compound of 重 (multiple, layered) and 星 (star). The term is a direct calque from English 'multiple star' or German 'Mehrfachstern', adopted in modern Japanese astronomy.