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
West Yorkshire Hurdle (5,029 metres) in 1992. The race was sponsored by John Smith's from 2000 to 2012 and run as the John Smith's Hurdle. Since 2013, it has been sponsored by Bet365 and was run as the Bet365 Hurdle in 2013, 2014, 2016 and 2018. It was reduced back to 3 miles in 2015. ---- West Yorkshire Hurdle The West Yorkshire Hurdle is a Grade 2 National Hunt hurdle race in Great Britain which is open to horses aged four years or older. It is run at Wetherby, West Yorkshire, over a distance of about 3 miles (3 miles and 26 yards,