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What are the Illumination Zones of the Earth? enlightenment

What are the illumination zones of the Earth? Enlightenment

Illumination zones on Earth are the areas that can be distinguished in terms of illumination conditions. Not every point on earth has the same illuminance or the same duration of illumination. The earth's rotation and the permanent orbit of the earth around the sun are responsible for this. Because our earth is tilted on its own axis, different angles of incidence result as the planet orbits the sun.

This interaction results in a total of three different lighting zones, which can also be determined based on the length of the day and the height of the sun over the course of the year. These three lighting zones are described and presented in the following text. Each of them has different characteristics and peculiarities and stands for a specific geographical location on our planet. Since only three lighting zones are differentiated, these are of course very large in their extent.

1. Lighting Zone

The first zone of illumination is the so-called “tropical zone”, which extends from latitude 23.5 degrees north to latitude 23.5 degrees south of the equator. This zone thus extends to the Sahara in the northern hemisphere and to South Africa and Namibia in the southern hemisphere. They should therefore not be equated with the climatic zones of the earth. The climatic tropics are narrower and closer to the equator and do not spread as far. Of course, the rainforest that is typical for them does not penetrate into the Sahara. The tropical lighting zone therefore contains several climate zones, including the classic “tropics”.

2. Lighting Zone

The second illumination zone is located between the Tropic of Cancer and the Arctic Circle, at a latitude between 23.5 degrees and 66.5 degrees. This tropic/polar circle zone extends from North Africa across Europe to Scandinavia. It also contains several climatic zones and must not be equated with the climatic classification. The angle of incidence of the sun and the resulting heat and strength of the light rays are also decisive here.

3. Lighting Zone

The third lighting zone is virtually the counterpart to the second, only in the southern hemisphere. It spreads out between 23.5 degrees and 66.5 degrees south latitude and extends from the Tropic of Cancer to the Antarctic Circle. Geographically, it includes the southernmost tip of the African continent, as well as the southern half of South America and Australia.

At its end, it then encounters the beginning of the Antarctic landmass and ends there at the Antarctic Circle. This makes this zone of illumination the zone of the three that occupies the least landmass and thus also houses the fewest people. The largest landmass and most people is home to the second zone of illumination in the northern hemisphere. Here is also the largest and most productive economic zone on earth. Of course, this is also strongly related to this illuminance and the resulting climatic conditions.


Overall, the earth is divided into the three lighting zones presented. The physical nature as a sphere is of course decisive for this phenomenon. If the earth were flat as a sheet of paper and the sun were shining directly on it from above, the same intensity of illumination would reach every point. However, because the earth is a sphere and thus has a curved surface, some rays from the sun are faster and stronger at the outermost points of the sphere, the tropics and equator, than at other areas on the surface.

In addition, the earth's axis is not straight but has an oblique inclination, which further intensifies the phenomenon. Therefore, in science, a distinction is made between these three different and large lighting zones.

Due to this different lighting, heat and light are of course also absorbed differently from the earth's surface. This allows a diverse climate to develop and an atmosphere to develop that makes the planet's unique biodiversity possible in the first place. If there were the same amount and the same intensity of light everywhere, then the world would consist of a single tropical jungle.

Many species could not have come into being and the human species would also have had its difficulties in developing. It would also be kind of monotonous and boring on earth. Luckily, then, there are these different lighting zones that have been instrumental in creating the most fascinating variety of species and biodiversity in our universe. The lighting zones are therefore an integral part of the procedures and processes that keep the earth alive.

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