Vranjska Banja vs Aurora

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The City municipality of Vranjska Banja (Serbian: Градска општина Врањска Бања, romanized: Gradska opština Vranjska Banja) is a town and one of two city municipalities which constitute the City of Vranje. It is also one of the spa resorts in Serbia. Located 12 km (7 mi) northeast from the city of Vranje, it is surrounded by forests and rolling hills which offer nice scenery, and a good restaurant by the old clinic is situated at the end of the town.

The municipality has a population of 9,580 inhabitants, while the urban area has 5,347 inhabitants.

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