Aurora vs Aarhus

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An aurora (plural: auroras or aurorae), sometimes referred to as polar lights (aurora polaris), northern lights (aurora borealis), or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras are the result of disturbances in the magnetosphere caused by solar wind. These disturbances are sometimes strong enough to alter the trajectories of charged particles in both solar wind and magnetospheric plasma. These particles, mainly electrons and protons, precipitate into the upper atmosphere (thermosphere/exosphere).

The resulting ionization and excitation of atmospheric constituents emit light of varying color and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes.

Source: Wikipedia

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Aarhus (, also US: , Danish: [ˈɒːˌhuˀs] (listen); officially spelled Århus from 1948 until 1 January 2011) is the second-largest city in Denmark and the seat of Aarhus municipality. It is located on the east coast of the Jutland peninsula, in the geographical centre of Denmark, 187 kilometres (116 mi) northwest of Copenhagen and 289 kilometres (180 mi) north of Hamburg, Germany. The inner urban area contains 280,534 inhabitants (as of 1 January 2020) and the municipal population is 349,983 (as of 2020). Aarhus is the central city in Business Region Aarhus and in the East Jutland metropolitan area, which had a total population of 1.378 million in 2016.The history of Aarhus began as a fortified Viking settlement founded in the 8th century and with the first written records stemming from the bishopric seated here from at least 948. The city was founded on the northern shores of a fjord at a natural harbour and the primary driver of growth was for centuries seaborne trade in agricultural products. Market town privileges were granted in 1441, but growth stagnated in the 17th century as the city suffered blockades and bombardments during the Swedish Wars. In the 19th century it was occupied twice by German troops during the Schleswig Wars but avoided destruction. As the industrial revolution took hold, the city grew to become the second-largest in the country by the 20th century. Today, Aarhus is at the cultural and economic core of the region and the largest centre for trade, services, industry, and tourism in Jutland.

The city ranks as the 92nd-largest city in the European Union, and as number 234 among world cities. It is also a top 100 conference city in the world. Aarhus is the principal industrial port of the country in terms of container handling and an important trade hub in Kattegat. Major Danish companies have based their headquarters there and people commute for work and leisure from a wide area in Region Midtjylland. It is a centre for research and education in the Nordic countries and home to Aarhus University, Scandinavia's largest university, including Aarhus University Hospital and INCUBA Science Park. Being the Danish city with the youngest demographics, with 48,482 inhabitants aged under 18, Aarhus is also the second fastest growing Danish city, with an average growth of 4,500 people per year since 2008.Aarhus is known for its musical history. In the 1950s, many jazz clubs sprang up around the city, fuelled by the young population. By the 1960s, the music scene diversified into rock and other genres. In the 1970s and 1980s, Aarhus became the centre for Denmark's rock music, fostering many iconic bands such as Kliché, TV-2 and Gnags. Aarhus is home to the annual eight-day Aarhus Jazz Festival, the SPoT Festival, and the NorthSide Festival. In 2017, Aarhus was European Capital of Culture along with Paphos in Cyprus.

Source: Wikipedia