Convert Earth's polar radius to ell
Please provide values below to convert Earth's polar radius [R_p] to ell [ell], or Convert ell to Earth's polar radius.
How to Convert Earth's Polar Radius to Ell
1 R_p = 5561463.07961505 ell
Example: convert 15 R_p to ell:
15 R_p = 15 × 5561463.07961505 ell = 83421946.1942257 ell
Earth's Polar Radius to Ell Conversion Table
| Earth's polar radius | ell |
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Earth's Polar Radius
The Earth's polar radius is the distance from the center of the Earth to the North or South Pole, approximately 6,356.8 kilometers.
History/Origin
The fact that the Earth is an oblate spheroid, flattened at the poles, has been known since the 18th century. Modern measurements are made with high precision.
Current Use
The Earth's polar radius is a key parameter in geodesy and is used to define the Earth's shape and gravitational field.
Ell
The ell is an obsolete unit of length, originally used for measuring cloth. Its length varied in different countries, but it was generally around 45 inches.
History/Origin
The word "ell" is derived from the Latin "ulna," meaning "forearm," as the unit was originally based on the length of the forearm.
Current Use
The ell is no longer in use.