Earth radius (denoted as R🜨 or RE) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an...

Earth for calculation of line-of-sight paths from maps, when a direct visual fix cannot be made. Designs for microwave formerly used 4⁄3 Earth radius...

earthshine is [ Earth albedo × (Earth radius / Radius of Moon's orbit)2 ] relative to the direct solar illumination that occurs for a full moon. (Earth albedo...

and shape of the Earth. The simplest model for the shape of the entire Earth is a sphere. The Earth's radius is the distance from Earth's center to its surface...

The term "super-Earth" is also used by astronomers to refer to planets bigger than Earth-like planets (from 0.8 to 1.2 Earth-radius), but smaller than...

be related to the equatorial radius and the polar radius, respectively a and b (see: Earth polar and equatorial radius of curvature). Then, the flattening...

the average radius of Jupiter, 109 times the radius of the Earth, and 1/215th of an astronomical unit, the approximate distance between Earth and the Sun...

20% of Earth’s radius or 70% of the Moon's radius. There are no samples of Earth's core accessible for direct measurement, as there are for Earth's mantle...

§ Computational formulae. The shape of the Earth closely resembles a flattened sphere (a spheroid) with equatorial radius a {\displaystyle a} of 6378.137 km;...

why the polar circumference of the Earth is actually 40,008 kilometres, instead of 40,000. Earth radius Spherical Earth Nautical mile Geographical mile Arabic...