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League


A league is an old unit of distance that was commonly used in the past, especially for measuring distances on land or sea. Traditionally, one league equals about 3 miles or roughly 4.8 kilometers. The exact length of a league could vary by country and time period. It was often used by sailors and travelers to describe how far they had gone. Although the league is mostly obsolete today, it still appears in literature and historical contexts.


Light Year


A light year is a unit of distance used in astronomy to measure how far light travels in one year. Light moves extremely fastβ€”about 299,792 kilometers per secondβ€”so in one year, it travels roughly 9.46 trillion kilometers (or about 5.88 trillion miles). Light years help scientists express the huge distances between stars and galaxies. For example, the nearest star to Earth, Proxima Centauri, is about 4.24 light years away. The term β€œlight year” can be confusing because it sounds like a measure of time, but it actually measures distance.



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