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The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as light and infrared radiation. It is by far the most important source of energy for life on Earth. Its diameter is about 1.39 million kilometres (864,000 miles), or 109 times that of Earth, and its mass is about 330,000 times that of Earth. It accounts for about 99.86% of the total mass of the Solar System.
Roughly three quarters of the Sun's mass consists of hydrogen (~73%); the rest is mostly helium (~25%), with much smaller quantities of heavier elements, including oxygen, carbon, neon, and iron.The Sun is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow). It formed approximately 4.6 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System. The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process.
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Fife (, Scottish English: [fɐi̯f]; Scottish Gaelic: Fìobha, IPA: [fiːvə]; Scots: Fife) is a council area, historic county, registration county and lieutenancy area of Scotland. It is situated between the Firth of Tay and the Firth of Forth, with inland boundaries to Perth and Kinross (i.e. the historic counties of Perthshire and Kinross-shire) and Clackmannanshire. By custom it is widely held to have been one of the major Pictish kingdoms, known as Fib, and is still commonly known as the Kingdom of Fife within Scotland. A person from Fife is known as a Fifer.
Fife was a county of Scotland until 1975, having been the parliamentary constituency of Fife in the House of Commons of the United Kingdom until 1885 and the Fife constituency in the Parliament of Scotland until the Acts of Union 1707. In older documents it was very occasionally known by the anglicisation Fifeshire. From 1975 to 1996 Fife was a local government region, divided into three districts: Dunfermline, Kirkcaldy and North-East Fife.