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

Nitrogen cycle, Nitrogen Cycle: Nitrogen is vital part of many essentia...

Nitrogen Cycle: Nitrogen is vital part of many essential organic  compounds especially nucleic acids and proteins. It also forms a major part (79 per cent) of the atmosphere. I

Define calculi and casts - abnormal constituent of urine, Define Calculi an...

Define Calculi and casts - abnormal constituent of urine An abnormal concretion in the body usually formed of mineral salts and found in the gall bladder, kidney or urinary bla

In what conditions an element is called an essential element, Under what co...

Under what conditions an element is called an essential element?   An element is called as an essential element, if:   a.  The plant can not complete its life cycle without it

Scientific approach to problem solving, Scientific approach to problem solv...

Scientific approach to problem solving: The scientific method and the features of scientific knowledge described above are in no way restricted  to the domain of scientists alo

Explain immunohistochemistry, Explain Immunohistochemistry Here the Ag ...

Explain Immunohistochemistry Here the Ag is tagged with a fluorescent dye (e.g. rhodamine). Inspite of a tag, the Ab binds to the Ag. In the section of a tissue, the Ag with ta

What is the earth made of, What is the earth made of? The overall compo...

What is the earth made of? The overall composition of the Earth, in terms of elemental composition is as follows:   Iron 34.6% Oxygen 29.5% Magnesium 12.7% Silic

Anatomy & Physiology 102, please explain cholecsystikinin and the gallbladd...

please explain cholecsystikinin and the gallbladder functions

Explain genetic theory of ageing, Explain Genetic Theory of ageing Rate...

Explain Genetic Theory of ageing Rate of ageing varies between species. The difference is in the genetic changes in the species. Thus it can be said that gradual impairment of

Aluminum, What are some properties that the element contain.

What are some properties that the element contain.

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