Earth radius (denoted as R🜨 or R E {\displaystyle R_{E}} ) is the distance from the center of Earth to a point on or near its surface. Approximating the...

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 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...

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...

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...

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...

are in LEO, with an altitude never more than about one-third of the radius of Earth (or about 2000 kilometers). The term LEO region is also used for the...