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Sun Composition, Solar Angles, and Estimation of Solar Radiation by Bashria A.A. Yousef; Ali Radwan; Abdul Ghani Olabi; Mohammad Ali Abdelkareem is a book available to read on EtoBox.

What is Sun Composition, Solar Angles, and Estimation of Solar Radiation about?

The sun consists of an intensive hot gaseous matter, and it has a sphere shape of 1:39 3 10 9 m diameter and is about 1:5 3 10 11 m from the earth. It rotates around its axis once every 4 weeks that takes about 27À30 days. The sun has an effective blackbody temperature of 5777 K [1]; however, as shown in Fig. .1.1, the sun consists of several layers at different temperatures and densities. The temperature at the center of the sun (known as the core region) is in the range of 8 3 10 6 to 40 3 10 6 K, and its density is 100 times the density of the water.At the core, 90% of the sun energy is generated. At a distance of 0.7R from the center (where R is the radius of the sun), the temperature and density dropped to about 130; 000 K and 70 kg=m 3 ; at this region, the energy transfer occurs only by radiation in form of gamma and X-ray radiation. From 0.7R to R, the temperature and density experience more drop, the convection process starts to take place and becomes significant, and this region is known as the convective region. The outer layer of the convective zone is known as photosphere layer. The edge of the photosphere layer consists of gases that has an ability to absorb and emit

Author

Bashria A.A. Yousef; Ali Radwan; Abdul Ghani Olabi; Mohammad Ali Abdelkareem

Publisher

Elsevier Science & Technology

Published

2023

Language

EN

ISBN

9780323995696

Subjects

Engineering, Science, Economics