How big can solar prominences be? Detailed answer

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How big can solar prominences be? Detailed answer

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How big can solar prominences be?

Prominences are the most grandiose of all formations in the solar atmosphere. A typical prominence looks like a giant luminous arch formed by jets of plasma that is denser and less hot than the surrounding solar corona.

Quiet, active and eruptive prominences are distinguished according to the type of prominences, according to the speed and features of the movement of matter.

Calm prominences are characterized by slow movement and shape change; time of their existence - weeks and even months.

Active prominences are characterized by rather fast motions of matter flows from the prominence to the photosphere, from one prominence to another.

Eruptive ("soaring") prominences look like huge fountains erupting at a speed of hundreds of kilometers per second and changing their shape rather quickly; they exist for a short time - from several minutes to several hours.

With a thickness of 5-10 thousand kilometers, a prominence can have a height of tens of thousands of kilometers. Some eruptive prominences reach a height of 1,7 million kilometers above the surface of the Sun (a very impressive sight, given that the radius of our luminary is slightly less than 700 thousand kilometers).

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

Where did tennis come from?

Some games have emerged unexpectedly, by accident, and some have evolved over a long period of time. Tennis has a long history. The Greeks and Romans had a ball game which later became a French game. She, obviously, was the prototype of modern tennis.

The word "tennis" probably comes from the French word "Tennaz!", which means: "Here you are! Play!" Some researchers claim that the game originated in Egypt, Persia or the Arab countries. By 1300 and throughout the XNUMXth century, the game was being played all over France. People of noble birth gave themselves entirely to the game, and Louis X died of a cold he got while playing the game that preceded tennis.

Tennis was called the royal game because of the great interest shown in it by the kings of France and England. Henry II was considered the best tennis player in France, and later Louis XIV kept a permanent staff to look after his courts. The word "tennis" as the name of the game was first found in a book published in 1400. Henry VIII built a tennis court in 1529 at court in the Hamptons, which is still in use today.

Tennis was introduced to the US in 1870 via Bermuda. This game was played regularly at the Racket Court Club in New York in 1876. A court was then built in Boston in 1876, Newport, Rhode Island in 1880, and Chicago in 1893. Lawn tennis was developed by an Englishman, Major Wingfield, in 1874. But today, especially in the USA, the name "lawn tennis" is reduced to one word "tennis".

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