Aurora vs Cherkasy

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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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Cherkasy (Ukrainian: Черка́си, pronounced [t͡ʃɛrˈkɑsɪ]), also known as Cherkassy (Russian: Черка́ссы [tɕɪrˈkasɨ]), is a city in central Ukraine. Cherkasy is the capital of Cherkasy Oblast (province), as well as the administrative center of surrounding Cherkasky Raion (district) within the oblast. The city itself is designated as a city of oblast significance and does not belong to the raion. Population: 274,762 (2020 est.)Cherkasy is the cultural, educational and industrial center of Cherkasy Oblast and Central Economical Region of Ukraine.

Cherkasy has been known since the 13th century and played a great role in the history of Ukraine. The city was the center of Cossacks, citizens took part in Khmelnychchyna and Koliyivschyna (cossacks' and peasants' rebellions). The city is located on the right bank of Dnieper River (specifically at the Kremenchuk Reservoir), about 200 km (124 mi) south of the nation's capital, Kyiv. Cherkasy is divided into 2 boroughs (raions): Sosnivskiy (with Orshanets village) and Pridniprovskiy. In June 2011, the city celebrated its 725th anniversary.

Source: Wikipedia