Astronomy Part-4


The Sun is a star of the Milky Way that we see very bigger than other stars, because it is closer to the Earth. It is very small compared to some stars. Beetel Jujara is 800 times larger than Sun.

Sun distance from Earth is about 15 million km is. Its diameter is approximately 1,400,000 km That is, 109 times the diameter of the Earth. Its gravity is 28 times more than the Earth’s gravity.

The distance of the sun from the center of the galaxy is 32,000 light years on the basis of modern estimates. 250 km Sun takes 22.5 million years to complete one revolution around the center at the average speed per second. This period is called the universe year. The sun revolves around its axis just like the Earth. Sun is made of gases and therefore can rotate at different speeds on different latitudes. The duration of its rotation on the poles is approximately 24-26 days and 34-37 days on the equator. It is 300,000 times more massive than the Earth.

The sun is a great part of the glowing gas. This can be called a huge hydrogen bomb, because it produces excessive heat and light by nuclear fusion. From the coming light and the heat, life on earth is possible. Its light takes 8 minutes and 20 seconds to reach the ground.

The outer surface of the sun is called photosphere, which is around 6000 ° C, but the temperature of the center is 15,000,000 ° C.

The flames arising from the sun surface or photosphere, which are called solar flames. It is about 1000,000 km Reaches the height.

The chemical organization of the Sun contains hydrogen 71 percent helium 5 percent and the other element 2.5 percent.
8m from sunlight coming to Earth 6.6 sec It seems.

Sun structure

The light circle is the visible surface visible to the sun.
The thumb on the side of the light circle, which is not radiant, its color is red, called chromosphere.
Harmonic part of the sun (which only appears at the time of eclipse).
The emission of x-rays from the corona and when the entire solar eclipse occurs, the earth is illuminated by Corona.
When the temperature of any part of the sun decreases in comparison to other parts, it is seen as a spot, which is called a solar stigma. The life span takes place from a few hours to a few weeks. After several days of being a solar stain, radio communication is interrupted.
Black spots also appear on the surface of the sun. These are cooler than approximately 1500 ° C Celsius of the surface of the Sun (6000 ° C). The life span of these spots takes place from a few hours to several weeks. The temperature of a large spots can be up to 4000-5000 ° C. Stains are larger than ours, many times larger than ours.

Solar explosions and solar flames start to rise when the sun’s spots last longer. The result is that there is turmoil in the ionosphere and there are obstacles in radio communication on the earth.

we are going to take this article in next part.

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