Granada vs Aurora

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Granada ( grə-NAH-də, Spanish: [ɡɾaˈnaða]) , locally [ɡɾaˈna] is the capital city of the province of Granada, in the autonomous community of Andalusia, Spain. Granada is located at the foot of the Sierra Nevada mountains, at the confluence of four rivers, the Darro, the Genil, the Monachil and the Beiro. Ascribed to the Vega de Granada comarca, the city sits at an average elevation of 738 m (2,421 ft) above sea level, yet is only one hour by car from the Mediterranean coast, the Costa Tropical. Nearby is the Sierra Nevada Ski Station, where the FIS Alpine World Ski Championships 1996 were held. In the 2005 national census, the population of the city of Granada proper was 236,982, and the population of the entire urban area was estimated to be 472,638, ranking as the 13th-largest urban area of Spain. About 3.3% of the population did not hold Spanish citizenship, the largest number of these people (31%; or 1% of the total population) coming from South America.

Its nearest airport is Federico García Lorca Granada-Jaén Airport. The Alhambra, an Arab citadel and palace, is located in Granada. It is the most renowned building of the Islamic historical legacy with its many cultural attractions and architectural elements that make Granada a popular destination among the tourist cities of Spain. The Almohad influence on architecture is also preserved in the Granada neighborhood called the Albaicín with its fine examples of Moorish and Morisco construction. Granada is also well-known within Spain for the University of Granada which has an estimated 82,000 students spread over five different campuses in the city. The pomegranate (in Spanish, granada) is the heraldic device of Granada.

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