Longchang vs Aurora

Informations

Longchang (Chinese: 隆昌; pinyin: Lóngchāng) is a county-level city of Sichuan Province, China. It is under the administration of Neijiang city. Longchang has a population of nearly 760,000, covering 792 square kilometer. Longchang seizes an important geographic location as the boundary of Sichuan and Chongqing, and plays as distributing center of Sichuan, Yunnan, Guizhou, Chongqing. Since the advantageous location, many important traffic ways pass through Longchang, like the Chengdu–Chongqing Railway, highway, public road, East Chuanyun (Sichuan to Yunnan) road, Longna (Longchang to Luzhou) highway, Longya (Longchang to Ya'an) road, Longhuang (Longchang to Huangtong Guizhou) railway.

To get out of Sichuan Province and further go to the sea, you could choose Longchang as the best way. Thus it is called the east gate of Sichuan. In the long history, Longchang is famous for memorial arches and blue stone. Longchang is a feature to develop tourism. Nowadays, Longchang has finished the plan of bluestone cultural city with eight bluestone image views, including gate, culture, city's dining room, lounge, green park, landscape, business district, landmark. Still this county has some other tourism resources, like groups of memorial arches, Guyu artificial lake, Yunding stockaded village, and Lamp Mountain.

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