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Long Cubit


The long cubit is an ancient unit of length that is a variation of the standard cubit, measuring from the elbow to the tip of the middle finger. The long cubit is longer than the common cubit, typically about 21 inches (approximately 53 centimeters).


It was used in ancient civilizations such as Egypt and Mesopotamia for construction, land measurement, and crafts, especially when more precision or a larger unit was needed.


Key points:



  • Long cubit ≈ 21 inches (53 cm)



  • Longer than the standard cubit (usually about 18 inches)



  • Used in ancient architecture and surveying



  • Provided a larger base unit for measurements in construction



The long cubit helped ancient builders and surveyors manage larger scales while still relying on the human body as a reference.


Sun’s Radius


The radius of the Sun is the distance from its center to its surface (photosphere).



  • It is approximately 696,340 kilometers (about 432,685 miles).



  • The Sun is a nearly perfect sphere of hot plasma, and this radius defines its visible "surface."



  • The Sun’s radius is about 109 times the radius of Earth.



Key facts:



  • Sun’s radius ≈ 696,340 km



  • Defines the size of the Sun’s visible surface



  • Critical for understanding solar structure and scale



Knowing the Sun’s radius helps astronomers model solar phenomena and compare the Sun with other stars.




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