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 the monochromates or total colour blindness, Explain the Monochroma...

Explain the Monochromates or Total Colour Blindness The monochromate individuals lack all cone pigments and cannot distinguish colours at all. They find bright light very unple

Experiment of a siphon fountain, A siphon fountain Fit a glass jar (a ...

A siphon fountain Fit a glass jar (a flask from a used electric bulb) with hole rubber stopper. By one hole place a jet tube which will extend about half way to the top of the

Explain sterols, Sterols- steroids containing an alcoholic group at C-3...

Sterols- steroids containing an alcoholic group at C-3 position and a side chain of 8  to 10 carbon atoms at c-17

Zoology, what do you mean by "super class" species "pisces"?

what do you mean by "super class" species "pisces"?

Atmosphere, Atmosphere: Atmosphere is an envelope of the most useful ga...

Atmosphere: Atmosphere is an envelope of the most useful gases that cover the planet earth. It makes our planet unique and enables life to prosper. If  the earth did not have a

Beta catenin for nuclear import, 1.  Beta catenin is a protein that translo...

1.  Beta catenin is a protein that translocates to the nucleus in the presence of Wnt ligand. In the absence of Wnt, beta catenin is targeted for degradation. Using a cell line fro

ADVANCEMENT , how communication can bring about advancement in any society....

how communication can bring about advancement in any society..

What is competitive inhibition, Competitive inhibition This  type of in...

Competitive inhibition This  type of inhibition takes place when  a  compound having  a strong structural resemblance to the substrate competes with  it for the catalytic  site

Determine the sieve analysis method of soil texture, Determine the Sieve An...

Determine the Sieve Analysis Method of Soil texture As the name suggests sieve analysis is done using sieves and may give a true distribution of soil particles.  This method i

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