Does the sun shine the same way all the time? Detailed answer

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Does the sun shine the same way all the time? Detailed answer

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Does the sun shine the same way all the time?

The sun is a star, that is to say, it shines with its own light. Of course, this requires a lot of energy. Where does the sun get it from?

Scientists believe that its source is hydrogen atoms, which are in large numbers in the central, hottest, region of the Sun. There, they, uniting, turn into helium atoms as a result of thermonuclear reactions. In this case, huge energy is released, which then, having reached the surface of the Sun, is radiated into space in the form of light. Therefore, until the supply of hydrogen in it is exhausted, the Sun will give us its light. This light appears to us always equally bright. However, is this true?

The answer to this question is related to the structural features of the Sun. First of all, it should be remembered that it, unlike the Earth, is not a solid body. Although it rotates around its axis, however, its various parts rotate at different speeds. A point on the equator makes a complete revolution in 29 days, and near the pole - in 34.

The outer layer of the Sun, called the corona, consists of light rarefied gases. Its outer part has a white color and a radiant structure. These rays are stretched over millions of kilometers and cause, albeit small, but still noticeable changes in the brightness of the Sun.

Beneath the corona lies another layer of the solar atmosphere, the chromosphere, which is about 15 km thick and consists mainly of hydrogen and helium. From time to time, prominences are born in it, breaking through into the solar corona - huge streams of suddenly cooled matter, often in the form of giant arches 000 km high. They also affect how brightly the Sun shines.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What is a sextant?

When traveling the earth, you will not get lost if you know where the road you are walking leads to. Yes, and traveling by ship, if you can see the coast, you can easily determine your location, recognizing the hills, rivers, mountains, forests, beaches, and so on. In ancient times, sailors preferred to stay about three or four kilometers from the shore, so that they could always see the land. People who ventured into the open ocean were at great risk because they did not have a reliable way to determine their location. Later, such a method was found, and the sailors were able to determine where they were, learning the latitude and longitude of this place.

Latitude tells you how far north or south of the equator a place is.

Longitude indicates how far east or west an imaginary line through Greenwich is. These readings are measured in degrees. To determine latitude and longitude at sea, the navigator looks at the positions of the stars and the Sun. During the day, he learns the latitude by determining how high the Sun rises at noon. At night, he does this by determining the height of the night luminaries. Longitude is determined by comparing the time on board with the time in Greenwich, England. If the time on the ship is earlier, it means that you are west of Greenwich; if later, it means you are east. Each hour of time difference equals fifteen degrees west or east.

A sextant is an instrument used by a navigator to determine the position of the sun, moon, planets, and some stars. The sextant is shaped like a piece of a round pie, with a graduated scale on its rounded part. One end of the pointer is attached to the top of the sextant, just like a movable mirror. The other end points to the scale. Also attached to the sextant is a telescope and mirror glass in front of it. The navigator looks at the horizon through a telescope and this mirror and moves the mirror until the reflection of the observed star hits it, as if touching the horizon. The free end of the arrow will indicate on the scale the height of the observed luminary.

Test your knowledge! Did you know...

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