Sun vs Łódź

Informations

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

Informations

Łódź (Polish: [wutɕ] (listen)), written in English as Lodz, is the third-largest city in Poland and a former industrial centre. Located in the central part of the country, it has a population of 679,941 (2019). It is the capital of Łódź Voivodeship, and is located approximately 120 kilometres (75 mi) south-west of Warsaw. The city's coat of arms is an example of canting, as it depicts a boat (łódź in Polish), which alludes to the city's name. Łódź was once a small settlement that first appeared in 14th-century records. Despite being granted town rights in 1423, it remained the private property of the Kuyavian bishops and clergy until the late 18th century. The Second Industrial Revolution brought rapid growth in textile manufacturing and in population due to the inflow of migrants, notably Germans and Jews. Ever since the industrialization of the area, the city has struggled with multinationalism and social inequalities, which were documented in the novel The Promised Land by Nobel Prize-winning author Władysław Reymont. The contrasts greatly reflected on the architecture of the city, where luxurious mansions coexisted with redbrick factories and dilapidated tenement houses.

The industrial development and demographic surge made Łódź one of the largest cities in Poland. Under the German occupation during World War II, Łódź was briefly renamed to Litzmannstadt in honour of Karl Litzmann. The city's large Jewish population was forced into a walled zone known as the Łódź Ghetto, from which they were sent to German concentration and extermination camps. The city itself sustained insignificant damage during the war and became Poland's temporary seat of power in 1945. Łódź experienced a sharp demographic and economic decline after 1989. It was only in the 2010s that the city began to experience revitalization of its neglected downtown area. Łódź is ranked by the Globalization and World Cities Research Network on the “Sufficiency” level of global influence and is internationally known for its National Film School, a cradle for the most renowned Polish actors and directors, including Andrzej Wajda and Roman Polanski. In 2017, the city was inducted into the UNESCO Creative Cities Network and named UNESCO City of Film.

Source: Wikipedia