One of the wonderful natural treats of the world, Aurora. In the night sky in the polar region, a kind of light show can be seen. This is called Aurora. At the two magnetic poles of the earth, this light is seen dancing. Aurora, caused in the Northern Hemisphere, is called aurora borealis or northern lights. Aurora, on the other hand, is called the southern hemisphere, aurora australis or southern lights. This particular light in the polar region will know about Aurora, from today’s discussion.
We are surrounded by earth, invisible magnetosphere. This magnet protects the earth from the harmful radioactivity of the solar system. Various active particles or atoms, coming from the sun, are constantly crossing the earth. It is called, solar wind. When this solar wind comes closer to our Earth, the two poles of the earth also magnetize these atoms, pulling them towards the north and south poles. Atoms from the sun enter the Earth’s atmosphere, and react with the atoms of the atmosphere’s gas. And as a result of this reaction, different colors of light are generated. This is what we see from the earth, in the form of Aurora.
Aurora is mainly produced by the reaction of oxygen and nitrogen with solar wind. Due to the type and location of these sales candidates, different colors of light are seen. Nitrogen atoms produce mainly blue color. Again, if two nitrogen atoms react together, a purple color is produced. Apart from the height, Aurora color differences are also seen. At a height of 100 km from the surface, the oxygen atoms emit a green color. And if this reaction is completed at a height of 240 km, red light from the oxygen atom can be seen. When these colors are mixed with one another, a variety of new colors are created.
Sometimes the whole Aurora, can be just one color. Or sometimes it is seen, how many colors of the rainbow. The medieval scientist Galileo thought that Aurora could be seen as a reflection of the sun on Earth. Later in the early twentieth century, Norwegian scientist Kristian Birkeland, first proved that the atmosphere atom, responsible for the creation of the Aurora.
Ancient times Aurora
For thousands of years, people have been observing this Aurora. A cave image dating back 30,000 years before Christ, shows evidence of human Aurora observations in primitive times. However, the most accurate description of Aurora is found in ancient times, in a Chinese manuscript more than 2600 years ago. There Aurora is compared to the thunderstorm. In ancient times Aurora was central, many superstitions were prevalent. People in some societies thought that their ancestors danced in the sky, and such light was seen.
The solar wind that is responsible for such a beautiful light Aurora creation, at the same time causes some harmful side effects. These positively connected atoms on the surface of the earth, making the satellite a barrier to communication. As a result, radio, television, telephone or navigation systems can cause serious problems. Even these solar winds sometimes cause electric waves. Which can disrupt power supply across a wide area.
Most popular areas
Aurora is formed only at the north and south poles, with no sharp magnet attracting along the center of the earth. Around 4000 km of the two polar regions, this light is seen. However many times outside the region, far away Aurora can be seen. To see the Aurora in your own eyes, you have to move closer to the North or South Pole. In March and September, the highest Aurora is seen. Because in the spring and autumn, most of the solar wind gets stuck in the atmosphere in the polar regions of the earth.
The most popular areas to watch for Aurora are Iceland, Canada and Alaska. Notable places in these countries are Kirkjufell Mountain and bubble lodg in Iceland. Yellowknife, Wood Buffalo and Jasper National Park in Canada. And the Fairbanks of Alaska. In addition to these places, Aurora can be seen irregularly from many places, close to the polar regions.