structure of the sun
The internal structure consists of the core and the photosphere, while the atmosphere is formed by the chromosphere and the solar corona . The core is the central part of the Sun, yet little known, at which the thermonuclear reactions. The photosphere is a thin shell, opaque and bright, which defines the Sun outside and gives the spherical shape that we see (the solar disk). Observed at the photosphere telescope reveals a granular structure, due to convective motions in it are located. The chromosphere, thinner and perfectly transparent, has a thickness of 10,000 km and makes himself visible in the total solar eclipse , when it is not hidden from the glare of the photosphere. He has a beautiful pink color. The solar corona is visible only during total eclipses of the Sun, in the form of a soft luminescent glow of delicate beauty. E 'extremely thin and has a high temperature, about 1 million degrees. Do not have a precise outer boundary, and continues, in fact, in interplanetary space. In the solar corona observed some striking phenomena: solar enormous jets of matter at extremely high temperatures, which are thrown out. Some of them even reach a height of hundreds of thousands of kilometers. On the photosphere can be observed macchie scure, chiamate macchie solari e che già Galileo , con il suo cannocchiale , aveva individuato. Esse sono enormi vortici che manifestano al loro interno una parte più scura e meno calda. Le macchie solari si muovono da ovest verso est, il che significa che il sole ha un suo di rotazione: dal tempo impiegato dalle macchie a spostarsi da un bordo all'altro del Sole, si è potuta definire la durata del giorno solare. Questo corrisponde a circa 25 giorni terrestri
The internal structure consists of the core and the photosphere, while the atmosphere is formed by the chromosphere and the solar corona . The core is the central part of the Sun, yet little known, at which the thermonuclear reactions. The photosphere is a thin shell, opaque and bright, which defines the Sun outside and gives the spherical shape that we see (the solar disk). Observed at the photosphere telescope reveals a granular structure, due to convective motions in it are located. The chromosphere, thinner and perfectly transparent, has a thickness of 10,000 km and makes himself visible in the total solar eclipse , when it is not hidden from the glare of the photosphere. He has a beautiful pink color. The solar corona is visible only during total eclipses of the Sun, in the form of a soft luminescent glow of delicate beauty. E 'extremely thin and has a high temperature, about 1 million degrees. Do not have a precise outer boundary, and continues, in fact, in interplanetary space. In the solar corona observed some striking phenomena: solar enormous jets of matter at extremely high temperatures, which are thrown out. Some of them even reach a height of hundreds of thousands of kilometers. On the photosphere can be observed macchie scure, chiamate macchie solari e che già Galileo , con il suo cannocchiale , aveva individuato. Esse sono enormi vortici che manifestano al loro interno una parte più scura e meno calda. Le macchie solari si muovono da ovest verso est, il che significa che il sole ha un suo di rotazione: dal tempo impiegato dalle macchie a spostarsi da un bordo all'altro del Sole, si è potuta definire la durata del giorno solare. Questo corrisponde a circa 25 giorni terrestri
Rossana Maria Grillo
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