Aurora | |
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State | Ontario |
Country | Canada |
Capital | |
Population | 55445 |
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).
Plymouth | |
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State | |
Country | |
Capital | |
Population | 0 |
Plymouth ( (listen)) is a port city in England on the south coast of Devon, approximately 37 miles (60 km) south-west of Exeter and 190 miles (310 km) west-south-west of London. Enclosing the city are the mouths of the river Plym and river Tamar, which are naturally incorporated into Plymouth Sound to form a boundary with Cornwall.
Plymouth's early history extends to the Bronze Age when a first settlement emerged at Mount Batten. This settlement continued as a trading post for the Roman Empire, until it was surpassed by the more prosperous village of Sutton founded in the ninth century, now called Plymouth. In 1620, the Pilgrim Fathers departed Plymouth for the New World and established Plymouth Colony, the second English settlement in what is now the United States of America. During the English Civil War, the town was held by the Parliamentarians and was besieged between 1642 and 1646.
Throughout the Industrial Revolution, Plymouth grew as a commercial shipping port, handling imports and passengers from the Americas, and exporting local minerals (tin, copper, lime, china clay and arsenic). The neighbouring town of Devonport became strategically important to the Royal Navy for its shipyards and dockyards.
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