San Sebastian vs Aurora

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San Sebastián (Spanish: [san seβasˈtjan]) or Donostia (Basque: [doˈnos̺tia]) is a coastal city and municipality located in the Basque Autonomous Community, Spain. It lies on the coast of the Bay of Biscay, 20 km (12 miles) from the French border. The capital city of Gipuzkoa, the municipality's population is 186,095 as of 2015, with its metropolitan area reaching 436,500 in 2010. Locals call themselves donostiarra (singular), both in Spanish and Basque.

The main economic activities are commerce and tourism, and it is one of the most famous tourist destinations in Spain. Despite the city's small size, events such as the San Sebastián International Film Festival have given it an international dimension. San Sebastián, along with Wrocław, Poland, was the European Capital of Culture in 2016.

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