单词 | parsec |
释义 | parsec['pɑ:sek]n. 秒差距(天体距离单位) parsec par.sec AHD: [pär“sµk”] D.J. [6p$87sek]K.K. [6p$r7sWk]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, 3.086×1013 kilometers, or 1.918 × 10 13 miles. 秒差距:天文学自地球起的距离单位,星视差为1角秒,等于3.258光年,3.086×1013公里,或1.918×10 13英里 语源:1. par(allax) par(allax)2. sec(ond) 1sec(ond)1 |
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