Caen vs Aurora

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Caen (, French: [kɑ̃] (listen); Norman: Kaem) is a commune in northwestern France. It is the prefecture of the department of Calvados. The city proper has 108,365 inhabitants (as of 2012), while its urban area has 420,000, making Caen the largest city in former Lower Normandy. It is also the third largest municipality in all of Normandy after Le Havre and Rouen and the third largest city proper in Normandy, also after Rouen and Le Havre. The metropolitan area of Caen, in turn, is the second largest in Normandy after that of Rouen, the 21st largest in France. It is located 15 kilometres (9.3 miles) inland from the English Channel, 200 kilometres (120 miles) north-west of Paris, and connected to the south of England by the Caen (Ouistreham) to Portsmouth ferry route.

Caen is located in the centre of its northern region, and it is a centre of political, economic and cultural power. Located a few miles from the coast, the landing beaches, the bustling resorts of Deauville and Cabourg, as well as Norman Switzerland and Pays d'Auge, Caen is often considered the archetype of Normandy. Caen is known for its historical buildings built during the reign of William the Conqueror, who was buried there, and for the Battle for Caen, heavy fighting that took place in and around Caen during the Battle of Normandy in 1944, destroying much of the city. The city has now preserved the memory by erecting a memorial and a museum dedicated to peace, the Mémorial de Caen.

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