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Roman Actus


The actus was an ancient Roman unit of length used primarily in land measurement. It is approximately 120 Roman feet, which equals about 35.5 meters (around 116.5 feet).


The actus was often used to define dimensions of fields and plots of land. It was also part of Roman surveying practices, helping organize land division and property boundaries.


Key facts:



  • 1 actus = 120 Roman feet ≈ 35.5 meters



  • Used in Roman land surveying and agriculture



  • Essential for measuring fields and agricultural plots



  • Reflects the Roman emphasis on precise land division



The actus highlights the sophistication of Roman engineering and property management in their time.



Earth’s Distance from the Sun


The average distance between the Earth and the Sun is known as an Astronomical Unit (AU).



  • It is approximately 149.6 million kilometers (about 93 million miles).



  • This distance varies slightly throughout the year because Earth’s orbit is elliptical—closest at perihelion (~147.1 million km) and farthest at aphelion (~152.1 million km).



  • The astronomical unit is a fundamental standard for measuring distances within our solar system.



Key facts:



  • Average distance ≈ 149.6 million km (1 AU)



  • Varies due to elliptical orbit



  • Basis for measuring planetary distances



Understanding Earth’s distance from the Sun is essential for studying seasons, climate, and orbital mechanics.



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