parsec

名词 parsec:

1. a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
   同义词：secpar

par.sec

n.（名词）
A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.08'×03 kilometers, or .98 × 0 3 miles.
秒差距：天文学自地球起的距离单位，星视差为角秒，等于3.258光年，3.08'×03公里，或.98×0 3英里

来源：
par(allax)
par(allax)
sec(ond)
sec(ond)