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

Define nerve cell, Define Nerve Cell The basic unit of the nervous syst...

Define Nerve Cell The basic unit of the nervous system as studied above, is the individual nerve cell - the neuron. The nerve cells operate by generating electrical signals and

Dating the past, Dating  the Past: Today, that  a particular  rock  i...

Dating  the Past: Today, that  a particular  rock  is a million ycars old, or a fossil is 50 thousand ycars old. For  instance, how do we estimate the duration of various geo

food plant engineeringsystems, water at 20 degree cellsuis is flowing a ra...

water at 20 degree cellsuis is flowing a rate of 20 L/minute through a 5 cm is internal diameter pipe. the viscosity of water at this temperatures is 0.98c cP. calculate the reynol

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

how communication can bring about advancement in any society..

Hardness of the material, What is the common name for the test that provide...

What is the common name for the test that provides the hardness of the material by the size of an indent left in it by a standard steel ball? The Brinell Test

Acute and chronic effects, Acute and Chronic Effects : The effects of acci...

Acute and Chronic Effects : The effects of accidents due to chemicals are severe and immediate on the human body. These effects are called acute effects and can be traced without

Minerals, Minerals  Minerals like coal, iron, copper, steel etc. are us...

Minerals  Minerals like coal, iron, copper, steel etc. are used in all kinds of industries and in every-day life. The rate of consumption of minerals  is increasing every year.

Define age related changes in immune mechanisms, Define age related changes...

Define age related changes in Immune mechanisms The immune competence decreases with age. This affects the cell-mediated and humoral immunity. We will learn about these aspect

Management science, advantages of Vogel''s approximation method

advantages of Vogel''s approximation method

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