Bydgoszcz vs Aurora

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Bydgoszcz (UK: BID-goshtch, US: -⁠gawsh(tch), Polish: [ˈbɨdɡɔʂtʂ] (listen); German: Bromberg [ˈbʁɔmbɛɐ̯k]; Latin: Bidgostia, Brombergum) is a city in northern Poland, on the Brda and Vistula rivers. With a city population of 348,190 (December 2019), and an urban agglomeration with more than 470,000 inhabitants, Bydgoszcz is the eighth-largest city in Poland. It has been the seat of Bydgoszcz County and the co-capital, with Toruń, of the Kuyavian-Pomeranian Voivodeship since 1999. Prior to this, between 1947 and 1998, it was the capital of the Bydgoszcz Voivodeship, and before that, of the Pomeranian Voivodeship between 1945 and 1947. Located in the historical region of Kuyavia, it is its largest city. The city is part of the Bydgoszcz–Toruń metropolitan area, which totals over 850,000 inhabitants.

Bydgoszcz is the seat of Casimir the Great University, University of Technology and Life Sciences and a conservatory, as well as the Medical College of Nicolaus Copernicus University in Toruń. It also hosts the Pomeranian Philharmonic concert hall, the Opera Nova opera house, and Bydgoszcz Airport. Due to its location between the Vistula and Oder rivers, and the watercourse of the Bydgoszcz Canal, the city forms part of a water system connected via the Noteć, Warta and Elbe with the Rhine and Rotterdam. Bydgoszcz is an architecturally rich city, with neo-gothic, neo-baroque, neoclassicist, modernist and Art Nouveau styles present, for which it earned a nickname Little Berlin. The notable granaries on Mill Island and along the riverside belong to one of the most recognized timber-framed landmarks in Poland.

Source: Wikipedia

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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