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

Solar wind and solar flare, Solar Wind and Solar Flare Most of  the S...

Solar Wind and Solar Flare Most of  the Sun's family is continually bathed in an outflow of material from the Sun's atmosphere. Streams of electrons and protons continuously

Keep concentrations of ions constant - Function of Kidney, Keep the Concent...

Keep the Concentrations of Ions Constant Keep the concentrations of various ions and other important substances constant. A number of chemicals are important to the blood chemi

Diabetes mellitus, life style modification in management of diabetes?

life style modification in management of diabetes?

Water conservation, true or false? water conservation efforts have been who...

true or false? water conservation efforts have been wholly inaffective

Define contribution of eosinophils, Define Contribution of Eosinophils ...

Define Contribution of Eosinophils They are specifically equipped to deal with a lot of parasites (all helminth worms). The coating of helminthes and some complement components

Nutrients, difference between micro and macro nutrients

difference between micro and macro nutrients

What is international enzyme, What is International Enzyme Internation...

What is International Enzyme International Enzyme :- the amount of enzyme that catalyses the transformation of 1 mole  of substrate  into product in 1 minute.

Single neurons and multilayer networks, 1. The output of a single neuron is...

1. The output of a single neuron is given by y = f(w 1 x 1 +w 2 x 2 +w 0 x 0 ), where x 1 and x 2 are inputs, x 0 has the constant value 1, w 0 , w 1 and w 2 are parameters

Safety spectacles in personal protective devices, Safety spectacles : Safe...

Safety spectacles : Safety spectacles need to be used where there is the slightest risk of splashes of chemicals or fragments of dust, glass, etc. getting into the eyes.

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