| Hangul | 연성계 |
| Romanization | yeonseong-gye |
| Meaning | binary star system |
| Part of Speech | noun |
| TOPIK Level | TOPIK Level 6 |
연성계는 두 별이 공통 질량 중심을 중심으로 공전하는 항성 시스템이에요.
yeonseong-gye-neun du byeori gongtong jillyangjangsim-eul jungsim-euro gongjeonhaneun hangseong siseutemieyo.
A binary star system is a stellar system in which two stars orbit a common center of mass.
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연성계 (yeonseong-gye) means "binary star system" in Korean. It is a TOPIK Level 6 vocabulary word.
연성계 is pronounced "yeonseong-gye" in Revised Romanization.
연성계 is a TOPIK Level 6 word. TOPIK Level 6 is the highest level with ~10,000+ words.