Aurora vs Alba Iulia

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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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Alba Iulia (Romanian pronunciation: [ˌalba ˈjuli.a] (listen); German: Karlsburg or Carlsburg, formerly Weißenburg; Hungarian: Gyulafehérvár; Latin: Apulum Ottoman Turkish: Erdel Belgradı or Belgrad-ı Erdel), is a city that serves as the seat of Alba County in the west-central part of Romania. Located on the Mureș River in the historical region of Transylvania, it has a population of 63,536 (as of 2011).Since the High Middle Ages, the city has been the seat of Transylvania's Roman Catholic diocese. Between 1541 and 1690 it was the capital of the Eastern Hungarian Kingdom and the latter Principality of Transylvania.

At one point it also was a center of Eastern Orthodox Metropolitan of Transylvania with suffragan to Vad diocese. Alba Iulia is historically important for Romanians, Hungarians, and Transylvanian Saxons. In December 2018, Alba Iulia was officially declared Capital of the Great Union of Romania.The city administers four villages: Bărăbanț (Borbánd), Micești (Ompolykisfalud), Oarda (Alsóváradja) and Pâclișa (Poklos).

Source: Wikipedia