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
26-2 of several contrafacts by Coltrane, others including "Countdown" (from the album "Giant Steps" — a contrafact of Miles Davis's "Tune Up", and "Satellite" from the album "Coltrane's Sound" — based upon the Chord progression of "How High the Moon)". Coltrane plays the first statement of the melody on tenor saxophone, and switches to soprano saxophone for the last statement of the melody on the recorded version. "26-2" was also covered and recorded by the following: 26-2 "26-2" is a musical composition written by American Jazz musician John Coltrane. The song was recorded by Coltrane in 1960, but released ten years