Sun, Science

Assignment Help:

The Sun is the most  important star from our point of view.  It is the only star close enough to be studied in considerable detail. The grandeur of  the Sun is partly because of  its size. Its diameter is almost  110  times that of  the Earth. We can best visualise the volume of  the Sun if we realise  that more than a million earths can be dropped into the space it occupies. As we have said above, the mass of  the Sun is about 2 X 1033 grams, which makes it more than 300,000 times  the mass of  the Earth. The average density of the Sun, i.e..  its mass per unit volume, is about 1.4 g/cm3. 

 

1171_Sun.png

Although the Sun appears to be unchanging, it  rotates about  its axis once every 25 days. From time to  time dark patches appear on the surface of  the Sun, usually in pairsor in groups. These dark patches are called sunspots. Their movement  is an indication of  the Sun's  rotation. This fact was recognised  for the first tiine by Galileo. Actually, a sunspatis  a regiim cn  the surface  of the S&  that consists of gases almkt 10000c cooler than those surrounding the area. The number of  sunspots  increases and decreases in a cyclc every  11  years. In  the long term, there are periods of  low number of sunspots and High'number  of  sunspots.  


Related Discussions:- Sun

Non-renewable resources, Non-renewable Resources: After learning abou...

Non-renewable Resources: After learning about the renewable resources like water, forests etc., you would like to know what our non-renewable resources such as land, mineral,

What is CEC, What is CEC The CEC of most soils increases with pH, belo...

What is CEC The CEC of most soils increases with pH, below pH 6.0 the charge for clay mineral is relatively constant, while above pH 6.0 the charge on the mineral colloid incr

Explain viscosity - functions of plasma proteins, Explain Viscosity - Funct...

Explain Viscosity - Functions of Plasma Proteins Plasma proteins account for about half of the viscosity of blood, the other half being due to the blood cells. The contribution

.metals, Disadvantages of cold working metals (point form pliz)

Disadvantages of cold working metals (point form pliz)

Explain the gynaecological morbidity, Explain the Gynaecological morbidity ...

Explain the Gynaecological morbidity Gynaecological morbidity, which covers any condition, disease or dysfunction of the reproductive system that is not related to pregnancy, a

Housing conditions for environmen, Housing: Housing is an  important co...

Housing: Housing is an  important component of healthy environment. Probably you are aware that housing conditions for the vast majority of people in  India are not up to the s

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd