Light Year (ly)
Definition: A light-year (ly) is the distance light travels in one Julian year (365.25 days), approximately 9.461 trillion kilometers or 5.878 trillion miles. It is used for measuring astronomical distances.
History: The term 'light-year' was first introduced in the 19th century to help astronomers express cosmic distances. It replaced astronomical units that were cumbersome for measuring vast space distances.
Current Use: Light-years are used in astronomy to describe distances between stars, galaxies, and other celestial objects. It is crucial for understanding the scale of the universe and cosmic events.
Yard (yd)
Definition: A yard (yd) is a unit of length equal to 0.9144 meters or three feet. It is commonly used in construction, sports fields, and textile measurements, particularly in the US and UK.
History: The yard originated in medieval England, standardized by King Henry I. It was originally based on the length of a man's belt or the distance from the nose to the thumb tip.
Current Use: Yards are widely used in the US and UK for measuring land, fabric, and sports fields, including American football. They are also commonly seen in real estate and landscaping measurements.
Quick Conversion Table Light Year (ly) to Yard (yd)
1 Light Year (ly) equal to 1.03462e+16 Yard (yd)
5 Light Year (ly) equal to 5.17308e+16 Yard (yd)
10 Light Year (ly) equal to 1.03462e+17 Yard (yd)
20 Light Year (ly) equal to 2.06923e+17 Yard (yd)
30 Light Year (ly) equal to 3.10385e+17 Yard (yd)
50 Light Year (ly) equal to 5.17308e+17 Yard (yd)
75 Light Year (ly) equal to 7.75962e+17 Yard (yd)
100 Light Year (ly) equal to 1.03462e+18 Yard (yd)