Aurora vs Addis Ababa

Informations

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

Informations

Addis Ababa (Amharic: አዲስ አበባ, Addis Abäba IPA: [adˈdis ˈabəba] (listen), "new flower") and also known as Finfinne (Oromo: Finfinne "natural spring") is the capital and largest city of Ethiopia. According to the 2007 census, the city has a population of 2,739,551 inhabitants. As a chartered city, Addis Ababa also serves as the capital city of the Oromia Region. It is where the African Union is headquartered and where its predecessor the Organisation of African Unity (OAU) was based. It also hosts the headquarters of the United Nations Economic Commission for Africa (ECA), as well as various other continental and international organizations.

Addis Ababa is therefore often referred to as "the political capital of Africa" for its historical, diplomatic and political significance for the continent. The city lies a few miles west of the East African Rift which splits Ethiopia into two, between the Nubian Plate and the Somali Plate. The city is surrounded by the Special Zone of Oromia and populated by people from different regions of Ethiopia. It is home to Addis Ababa University.

Source: Wikipedia