Convert astronomical unit to Earth equatorial radius Online | Free Length Converter

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".

Earth Equatorial Radius

The Earth's equatorial radius is the distance from the center of the Earth to the equator. It represents the Earth's radius measured along the equatorial plane.

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  Its value is approximately 6,378.1 kilometers (about 3,963.2 miles).

  
  
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  The Earth is not a perfect sphere but an oblate spheroid, so the equatorial radius is slightly larger than the polar radius.

  
  
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  This radius is important for geodesy, satellite orbits, and mapping.

  
  

Key facts:

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  Equatorial radius ≈ 6,378.1 km

  
  
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  Larger than polar radius due to Earth's flattening at the poles

  
  
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  Used in Earth sciences, navigation, and space missions

  
  

Understanding the Earth's equatorial radius helps in accurate modeling of the planet’s shape and gravitational field.