parsec / ˈpɑrˌsɛk /

🎓大学词汇准星准星座准秒准星数

parsec 的定义

n. 名词 noun

Astronomy.

  1. a unit of distance equal to that required to cause aheliocentric parallax of one second of an arc, equivalent to 206,265 times the distance from the earth to the sun, or 3.26 light-years.