Light-year Light-year The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres or 5.88 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time. The light-year is most often used when expressing distances to stars and other distances on a galactic scale, especially in nonspecialist and popular science publications. The unit most commonly used in professional astrometry is the parsec
1, 2, 3, Red Light (song) it reached number 7. It was named the number 39 song of 1968 on the "Cashbox" charts. The song was certified as a gold disc in September 1968. 1, 2, 3, Red Light (song) "1, 2, 3, Red Light" is a song written by Sal Trimachi and Bobbi Trimachi and was recorded by 1910 Fruitgum Company for their 1968 album, "1, 2, 3, Red Light". The song charted highest in Canada, going to number 1 on the "RPM 100" national singles chart in 1968. In the same year in the US, it went to number 5 on the "Billboard" Hot