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Vara Castellana

The vara castellana is a traditional Spanish unit of length that was widely used in Spain and its former colonies. It is roughly equivalent to 0.8359 meters (about 32.9 inches).

The vara castellana was commonly used in land measurement, construction, and textiles. Its length could vary slightly by region and time, but the standardized vara castellana became an important reference for legal and commercial measurements.

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  1 vara castellana ≈ 0.8359 meters (32.9 inches)

  
  
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  Used extensively in Spain and Spanish America

  
  
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  Common in land surveying, building, and textile measurement

  
  
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  Predecessor to modern metric units in Spanish-speaking countries

  
  

Though largely replaced by the metric system, the vara castellana remains relevant in historical documents and land records.

Astronomical Unit

An astronomical unit (AU) is a unit of distance used in astronomy to describe the average distance between the Earth and the Sun. It equals about 149.6 million kilometers (or about 93 million miles). The AU is useful for measuring distances within our solar system, such as the distance from Earth to other planets. For example, Mars is about 1.5 AU from the Sun. Using the AU makes it easier to understand and compare distances between planets without dealing with very large numbers. The symbol for astronomical unit is "AU".