こうねん
光年
1. light-yearAstronomy
2. Light-yearA light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres (or about 6 trillion miles). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year. The light-year is often used to measure distances to stars and other distances on a galactic scale, especially in non-specialist and popular science publications.
Read “Light-year” on English Wikipedia
Read “光年” on Japanese Wikipedia
Read “Light-year” on DBpedia
Read “Light-year” on English Wikipedia
Read “光年” on Japanese Wikipedia
Read “Light-year” on DBpedia
Discussions
Log in to talk about this word.