光年は天体の距離を表す単位.。一光年は9,460,730,472,580,800m。
プレアデス星団までは444.2光年。
-Light Year-
A unit of astronomical distance equivalent to the distance that light travels
in one year. A light year is 6 trillion miles.
The distance to the Pleiades Star Cluster is 444.2 light years.
（Image of the light in space.）