Rouen vs Sun

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Rouen (UK: , US: ; French: [ʁwɑ̃] (listen) or [ʁu.ɑ̃]) is a city on the River Seine in northern France. It is the capital of the region of Normandy. Formerly one of the largest and most prosperous cities of medieval Europe, the population of the metropolitan area (French: aire urbaine) is 666,035 (2017). People from Rouen are known as Rouennais. Rouen was the seat of the Exchequer of Normandy during the Middle Ages. It was one of the capitals of the Anglo-Norman dynasties, which ruled both England and large parts of modern France from the 11th to the 15th centuries. From the 13th century onwards, the city experienced a remarkable economic boom, thanks in particular to the development of textile factories and river trade. Claimed by both the French and the English during the Hundred Years' War, it was on its soil that Joan of Arc was tried and burned alive on May 30, 1431. Severely damaged by the wave of bombing in 1944, it nevertheless regained its economic dynamism in the post-war period thanks to its industrial sites and its large seaport, which today is the fifth largest in France.

Endowed with a prestige inherited mainly from the medieval era and with a plural architectural heritage that its historical monuments highlight, Rouen is an important cultural capital. Several renowned establishments are located here, such as the Museum of Fine Arts - one of the most important in France - or the Le Secq des Tournelles museum. Famous are its half-timbered houses. Rouen's religious buildings are plentifull and justify its nickname "City of a hundred steeples". The famous cathedral of Rouen is one of the highest in the world and known in arts as the subject of a series of paintings by Claude Monet. Labeled City of Art and History in 2002, it is a candidate for the title of European Capital of Culture for 2028. Seat of an archdiocese, it also hosts a court of appeal and a university. Every four to six years, Rouen becomes the showcase for a large gathering of sailing ships called "L'Armada"; this event makes the city an occasional capital of the maritime world.

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