Speed of light they appeared 13 billion years ago, when the universe was less than a billion years old. The fact that more distant objects appear to be younger, due to the finite speed of light, allows astronomers to infer the evolution of stars, of galaxies, and of the universe itself. Astronomical distances are sometimes expressed in light-years, especially in popular science publications and media. A light-year is the distance light travels in one year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri,
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,