测量恒星距离的天文学长度单位；一秒差距等于三十万亿公里

测量恒星距离的天文学长度单位；一秒差距等于三十万亿公里的英文翻译

基本释义

• 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