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Nuuk (Greenlandic pronunciation: [nuːk], Danish: [ˈnu(ː)k]; Danish: Godthåb [ˈkʌtˌhɔˀp]) is the capital and largest city of Greenland. Nuuk is the seat of government and the country's largest cultural and economic centre. The major cities from other countries closest to the capital are Iqaluit and St. John's in Canada and Reykjavík in Iceland. Nuuk contains almost a third of Greenland's population and its tallest building. Nuuk is also the seat of government for the Sermersooq municipality. In January 2020, it had a population of 18,326.The city was founded in 1728 by the Dano-Norwegian governor Claus Paarss when he relocated Hans Egede's earlier Hope Colony (Haabets Koloni) to the mainland, and was named Godthåb ("Good Hope"). The city officially adopted its current name in 1979, although the name "Godthåb" remained in use in Danish.
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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.