Light year (Astron.) The distance over which light can travel in a year's time; -- used as a unit in expressing stellar distances. It is more than 63,000 times as great as the distance from the earth to the sun.
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.