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

Explain haloenzyme, Haloenzyme :- A  whole  enzyme,  as a  complete  and...

Haloenzyme :- A  whole  enzyme,  as a  complete  and  functional molecule. Generally, a holoenzyme consists of a polypeptide portion (an apoenzyrne) and at least one cofactor or

Explain glucagon, Explain Glucagon Glucagon is secreted by a-cells of I...

Explain Glucagon Glucagon is secreted by a-cells of Islets of Langerhans. It is a hormone containing 29 amino acids. Its effects are opposite to that of insulin.

Inferential Satatics, Histograms and Descriptive Statistics Resources Websi...

Histograms and Descriptive Statistics Resources Website icon Histograms and Descriptive Statistics Scoring Guide. MS Word Icon Step-by-Step Guide: Histograms and Descriptive Statis

Explain increased cardiac output, Explain Increased Cardiac Output i) ...

Explain Increased Cardiac Output i)  An increase in blood volume increases the venous return and leads to an increased stroke volume. The increase in the blood volume may be d

Water pollution, Water Pollution Pollution of  fresh water is one of ...

Water Pollution Pollution of  fresh water is one of  the most serious environmental problems of the world as a whole. In our country most of the rivers and lakes are polluted

Guidance and counselling, the place of guidance and counselling in fosterin...

the place of guidance and counselling in fostering stable growth and development in teaching and learning situation

Working memory index, Mr. X's Working Memory Index (WMI) is interpretable; ...

Mr. X's Working Memory Index (WMI) is interpretable; the components do not vary significantly, so his WMI score can be interpreted as a single construct. WMI includes three tasks.

What is the structure of the urinary bladder, What is the structure of the ...

What is the structure of the urinary bladder? The bladder is composed of four layers of tissues. The outermost serous membrane is a thin membrane lining the closed cavities of

Earth science, similarity between granite and rhyolite

similarity between granite and rhyolite

Hazards in the laboratory, HAZARDS IN THE LABORATORY : Laboratories in...

HAZARDS IN THE LABORATORY : Laboratories in the biology department of schools, colleges and universities and other higher level organisation such as hospitals, veterinary esta

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