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Aln


An aln is an old Scandinavian unit of length traditionally used in Norway, Sweden, and Denmark, mainly for measuring cloth and textiles. It is roughly equivalent to 59.4 centimeters (about 23.4 inches), though the exact length varied by region and time period.


The aln was based on the length of the forearm, similar to the cubit in other cultures, and was commonly used by tailors and merchants.


Though obsolete today, the aln reflects historical measurement practices tied to the human body and remains of interest in historical and cultural studies of Scandinavia.


Summary:



  • 1 aln ≈ 59.4 cm (23.4 inches)



  • Used primarily for measuring textiles



  • Traditional Scandinavian unit based on the forearm length



  • Now mostly of historical interest


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 fast—about 299,792 kilometers per second—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 “light year” can be confusing because it sounds like a measure of time, but it actually measures distance.



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