Main article: Rotation (mathematics)Rotation of a planar figure around a pointRotational Orbit v SpinRelations between rotation axis, plane of orbit and axial tilt (for Earth).Mathematically, a rotati ...
Gravity tends to contract a celestial body into a perfect sphere, the shape for which all the mass is as close to the center of gravity as possible. Rotation causes a distortion from this spherical sh ...
An oblate spheroid with b a has surface areaS_{\rm oblate} = 2\pi a^2\left(1+\frac{1-e^2}{e}\tanh^{-1}e\right)\quad\mbox{where}\quad e^2=1-\frac{b^2}{a^2}and volumeV_{\rm oblate} = \frac{4}{3}\pi a^2 ...
The actual topographic surface is most apparent with its variety of land forms and water areas. This is, in fact, the surface on which actual Earth measurements are made. It is not suitable, however, ...
In the Newtonian theory of gravity, the gravitational force exerted by an object is proportional to its mass: an object with twice the mass-produces twice as much force. Newtonian gravity also follows ...
Jupiter is composed primarily of gaseous and liquid matter. It is the largest of four gas giants as well as the largest planet in the Solar System with a diameter of 142,984 km (88,846 mi) at its equa ...
A gas giant is a massive planet with a thick atmosphere of hydrogen and helium. They may have a dense molten core of rocky elements, or the core may have completely dissolved and dispersed throughout ...
The following fields of science are generally categorized within the Earth Sciences:Geology describes the rocky parts of the Earth's crust (or lithosphere) and its historic development. Major subdisci ...
Oxford spelling can be recognized by its use of the suffix ?ize instead of -ise: organization, privatize and recognizable instead of organisation, privatise and recognisable. The spelling affects abo ...
Relating grammatical number to physical discreteness In English (and in many other languages), there is a tendency for nouns referring to liquids (water, juice), powders (sugar, sand), or substances ( ...
On four (or possibly five) runestones, an invocation to Thor appears that reads "May Thor hallow (these runes/this monument)!" The invocation appears thrice in Denmark (DR 110, DR 209, and DR 220), an ...
Old Norse ?órr, Old English ?unor, Old High German Donar, Old Saxon thunar, and Old Frisian thuner are cognates within the Germanic language branch, descending from the Proto-Germanic masculine nou ...
Norse mythology is primarily attested in dialects of Old Norse, a North Germanic language spoken by the Scandinavian peoples during the European Middle Ages, and the ancestor of modern Scandinavian la ...
J?r? is the common word for earth in Old Norse, as are the word's descendants in the modern Scandinavian languages; Icelandic j?r?, Faroese j?r?, Danish, Swedish and Norwegian jord. It is cognat ...
