Kiel vs Sun

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Kiel (German: [kiːl] (listen)) is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 249,023 (2016). Kiel lies approximately 90 kilometres (56 mi) north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula and the southwestern shore of the Baltic Sea, Kiel has become one of the major maritime centres of Germany. For instance, the city is known for a variety of international sailing events, including the annual Kiel Week, which is the biggest sailing event in the world. Kiel is also known within modern history for the Kiel Mutiny, where German sailors refused to board Navy vessels in protest against Germany's continued fighting in World War I which led to the abdication of the Kaiser and the formation of the Weimar Republic. The Olympic sailing competitions of the 1936 and the 1972 Summer Olympics were held in the Bay of Kiel.Kiel has also been one of the traditional homes of the German Navy's Baltic fleet, and continues to be a major high-tech shipbuilding centre.

Located in Kiel is the GEOMAR - Helmholtz Centre for Ocean Research Kiel at the University of Kiel. Kiel is an important sea transport hub, thanks to its location on the Kiel Fjord (Kieler Förde) and the busiest artificial waterway in the world, Kiel Canal (Nord-Ostsee-Kanal). A number of passenger ferries to Sweden, Norway, Lithuania and other countries operate from here. Moreover, today Port of Kiel is a popular desination for cruise ships touring the Baltic Sea. Kiel's recorded history began in the 13th century, but the city was originally a Danish village, in the 8th century. Until 1864 it was administered by Denmark in personal union. In 1866 the city was annexed by Prussia and in 1871 it became part of Germany. Kiel was one of the founding cities of the original European Green Capital Award in 2006. In 2005 Kiel's GDP per capita was €35,618, which is well above Germany's national average, and 159% of the European Union's average.

Source: Wikipedia

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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.

In its core the Sun currently fuses about 600 million tons of hydrogen into helium every second, converting 4 million tons of matter into energy every second as a result. This energy, which can take between 10,000 and 170,000 years to escape the core, is the source of the Sun's light and heat. When hydrogen fusion in its core has diminished to the point at which the Sun is no longer in hydrostatic equilibrium, its core will undergo a marked increase in density and temperature while its outer layers expand, eventually transforming the Sun into a red giant. It is calculated that the Sun will become sufficiently large to engulf the current orbits of Mercury and Venus, and render Earth uninhabitable – but not for about five billion years. After this, it will shed its outer layers and become a dense type of cooling star known as a white dwarf, and no longer produce energy by fusion, but still glow and give off heat from its previous fusion. The enormous effect of the Sun on Earth has been recognized since prehistoric times. The Sun has been regarded by some cultures as a deity. The synodic rotation of Earth and its orbit around the Sun are the basis of solar calendars, one of which is the predominant calendar in use today.

Source: Wikipedia