Search results
Results From The WOW.Com Content Network
Pedosphere – The outermost layer of the Earth that is composed of soil and subject to soil formation processes. Outer layers. By composition. Crust (geology) – The outermost solid shell of a rocky planet, dwarf planet, or natural satellite. Moho Discontinuity – The line between the crust and the Earth's mantle.
An Earth ellipsoid or Earth spheroid is a mathematical figure approximating the Earth's form, used as a reference frame for computations in geodesy, astronomy, and the geosciences. Various different ellipsoids have been used as approximations. It is a spheroid (an ellipsoid of revolution) whose minor axis (shorter diameter), which connects the ...
An Earth mass (denoted as or , where 🜨 is the standard astronomical symbol for Earth ), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is M🜨 = 5.9722 × 1024 kg, with a relative uncertainty of 10 −4. [2] It is equivalent to an average density of 5515 kg/m3.
A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are colloquially referred to as moons, a derivation from the Moon of Earth . In the Solar System, there are six planetary satellite systems containing ...
An Earth god or Earth goddess is a deification of the Earth associated with a figure with chthonic or terrestrial attributes. There are many different Earth goddesses and gods in many different cultures mythology. However, Earth is usually portrayed as a goddess. Earth goddesses are often associated with the chthonic deities of the underworld.
The orbit of the Moon is a nearly circular ellipse about the Earth (the semimajor and semiminor axes are 384,400 km and 383,800 km, respectively: a difference of only 0.16%). The equation of the ellipse yields an eccentricity of 0.0549 and perigee and apogee distances of 362,600 km (225,300 mi) and 405,400 km (251,900 mi) respectively (a ...
High, medium, and low projections of the future human world population [1] In world demographics, the world population is the total number of humans currently living. It was estimated by the United Nations to have exceeded eight billion in mid-November 2022. It took around 300,000 years of human prehistory and history for the human population ...
Hemispheres of Earth. In geography and cartography, hemispheres of Earth are any division of the globe into two equal halves ( hemispheres ), typically divided into northern and southern halves by the Equator or into western and eastern halves by the Prime meridian. Hemispheres can be divided geographically or culturally, or based on religion ...