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

CELLS, Are there living beings without cells?

Are there living beings without cells?

How is soil formed, Q.How is soil formed? Soil is formed by breaking dow...

Q.How is soil formed? Soil is formed by breaking down of rocks at or near the surface of the Earth through various physical, chemical, and biological processes by various factor

Explain in detail about the sedimentary rocks, Explain in detail about the ...

Explain in detail about the Sedimentary rocks  Sedimentary rocks are formed from the breakdown of  igneous rocks.  These rocks are broken apart by plant roots, ice wedges, and

Explain internal respiration, Explain Internal Respiration What do you ...

Explain Internal Respiration What do you understand by the term 'internal respiration'? Well, the interchange of gases between the blood and cells of the body is internal respi

Fats and oils, Saponification value of fats and oils

Saponification value of fats and oils

Wave and tidal energy, Wave and tidal energy: Waves and tides are anoth...

Wave and tidal energy: Waves and tides are another source of energy which is perpetual and can be converted into electric energy, particularly where sea water can move into a n

Technical innovations and inventions, Technical innovations and Inventions:...

Technical innovations and Inventions: Medieval India witnessed considerable improvement and changes in  the field of  technology. While these changes were largely a result of

Management of water resources management, Management of Water Resources Man...

Management of Water Resources Management: Management of Water Resources Management  of water resources means a programme to provide an adequate supply of good quality of water

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