Solar System

The Solar System is the gravitationally bound system comprising the Sun and the objects that orbit it, either directly or indirectly. Of those objects that orbit the Sun directly, the largest eight are the planets, with the remainder being significantly smaller objects, such as dwarf planets and small Solar System bodies. Of the objects that orbit the Sun indirectly, the moons, two are larger than the smallest planet, Mercury.

The Solar System formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composed of rock and metal. The four outer planets are giant planets, being substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are ice giants, being composed mostly of substances with relatively high melting points compared with hydrogen and helium, called ices, such as water, ammonia and methane. All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic.

I Am

I Am may refer to:

Music

Albums

Songs

Keke Palmer discography

The discography of Keke Palmer, an American R&B singer-songwriter, consists of one studio album, one extended play, three mixtapes and seven singles. In 2005, Palmer signed a record deal with Atlantic Records. Palmer released her debut album So Uncool on September 18, 2007. The album failed to chart on the US Billboard 200, but did chart at number 85 on the R&B chart. The album was preceded by the lead single "Keep It Movin'". In 2010, Palmer was signed by the Chairman of Interscope Records, Jimmy Iovine, and began working on an album.

In January 2011, Palmer released her first mixtape Awaken. The mixtape was officially released on January 10, 2011, for downloads on mixtape-downloading websites. The first and only single released from the mixtape was "The One You Call". A music video was also released for the song. In July 2012, Palmer released the single "You Got Me" featuring Kevin McCall. The video for the single was released on July 11, 2012. Palmer released a self-titled mixtape Keke Palmer on October 1, 2012. It includes her new singles "You Got Me" & "Dance Alone" which have already been released. On May 16, 2013, Keke Palmer released a video showing her recording and performing a cover of Alicia Keys song "If I Ain't Got You".

Solar

Solar may refer to:

Astronomy

Other uses

System

A system is a set of interacting or interdependent component parts forming a complex/intricate whole. Every system is delineated by its spatial and temporal boundaries, surrounded and influenced by its environment, described by its structure and purpose and expressed in its functioning.

The term system may also refer to a set of rules that governs structure and/or behavior. Alternatively, and usually in the context of complex social systems, the term is used to describe the set of rules that govern structure and/or behavior.

Etymology

The term "system" comes from the Latin word systēma, in turn from Greek σύστημα systēma: "whole compounded of several parts or members, system", literary "composition".

History

According to Marshall McLuhan,

"System" means "something to look at". You must have a very high visual gradient to have systematization. In philosophy, before Descartes, there was no "system". Plato had no "system". Aristotle had no "system".

In the 19th century the French physicist Nicolas Léonard Sadi Carnot, who studied thermodynamics, pioneered the development of the concept of a "system" in the natural sciences. In 1824 he studied the system which he called the working substance (typically a body of water vapor) in steam engines, in regards to the system's ability to do work when heat is applied to it. The working substance could be put in contact with either a boiler, a cold reservoir (a stream of cold water), or a piston (to which the working body could do work by pushing on it). In 1850, the German physicist Rudolf Clausius generalized this picture to include the concept of the surroundings and began to use the term "working body" when referring to the system.