World Wallpapers

World - photo wallpapers; Galawallpapers.com : In English, world is rooted in a compound of the obsolete words were, man, and eld, age; thus, its oldest meaning is Age of Man. Its primary modern meaning is the planet Earth, especially when capitalized: the World. In this sense, a world map is a map of the surface of the Earth. World can also refer to human population in general or to a distinct group of people. In other contexts, world is sometimes used to mean any planet; for example, Mars and Jupiter are two worlds within the solar system. World is sometimes used to refer to the entire Universe. This is less common now that knowledge of space is more commonplace; however, it is still used vaguely in this sense (as in the whole wide world), which it is actually the most frequent sense in philosophy.
This site contains a large collection of celebrity wallpapers, movie wallpaper, animal wallpaper (Desktop Wallpapers) for your computer desktop.The terms wallpaper and desktop picture refer to an image used as a background on a computer screen, usually for the desktop of a graphical user interface. Wallpaper is the term used in Microsoft Windows, while the Mac OS calls it a desktop picture (prior to Mac OS X, the term desktop pattern was used to refer to a small pattern that was repeated to fill the screen).Typical categories can include cars, models
celebrities, scenery, abstract art, movies, pets, family, symmetry, and the users own photos.
The word planet originates with the Greek term πλανήτης (planētēs), meaning wanderer. It has been used for thousands of years to refer to astronomical bodies orbiting the Sun, and more recently around other stars. However, prior to the 2006 adoption of an official definition by the International Astronomical Union (IAU), there was no formal definition of what constituted a planet. The resolution adopted by the IAU states that, within the Solar System, a planet is a celestial body that:
(a) is in orbit around the Sun;
(b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape;
(c) has cleared the neighbourhood around its orbit.
As a result of this definition, the Solar System is now considered to have eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Those objects which fulfil criteria (a) and (b) but not (c) – Ceres, Pluto and Eris – are categorized as dwarf planets.
Beyond the Solar System, there have been more than two hundred objects discovered orbiting other stars. The IAU defines these objects as extrasolar planets if they:
(i) orbit a star or stellar remnants;
(ii) each have a mass below that required for the thermonuclear fusion of deuterium;
(iii) each fulfil the minimum mass/size requirement for planetary status in the Solar System.
This is a provisional definition which has not been formally adopted. The IAU also has not decided on whether the term planet should be extended to free-floating objects of planetary mass outside star systems, except to exclude those in young star clusters.