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

Pulley Systems, how do i make a box being pulled up a rough incline by a ro...

how do i make a box being pulled up a rough incline by a rope connected to a pulley

Define the mechanism of hormone action, Define the Mechanism of Hormone Act...

Define the Mechanism of Hormone Action Hormones affect cell function either by activating cyclic AMP (Adenosine monophosphate) mechanism or by activating genes. You may recall

Explain distal convoluted tubule - structures of a nephron, Explain Distal ...

Explain Distal Convoluted Tubule - Structures of a Nephron Distal Convoluted Tubule or Distal Tubule (DCT): A distal, rolled-together or coiled part of the ascending limb of th

Explain the small intestine, Explain the Small Intestine The small inte...

Explain the Small Intestine The small intestine is continuous with the stomach at the pyloric sphincter and leads into the large intestine at the ileocdic valve.  It is about 2

To show that expired air contains carbon dioxide, To show that expired air ...

To show that expired air contains carbon dioxide The two flasks are linked so that when you breathe by the T piece, all the air bubbles by the lime water in the flasks. One tub

A&P, Most of the plasma is composed of?

Most of the plasma is composed of?

The mop weighs less, The mop weighs less Put a floor mop in water. Wrin...

The mop weighs less Put a floor mop in water. Wring it out and then balance it on a triangular file placed on the corner of a table. Be sure you have it carefully balanced. Loo

Pollution due to radiations, Pollution due to Radiations: Hazards of ...

Pollution due to Radiations: Hazards of nuclear radiations are extremely serious, because they upset the genetic make up of  the living beings. Environmental  pollution from

Describe biosynthesis of nonessential amino acids, Describe Biosynthesis of...

Describe Biosynthesis of Nonessential Amino Acids ? This label 'nonessential' may mislead some people into believing that we don't need it. But, in essence, "non essential" as

Planets., What are all the planets in our solar system?

What are all the planets in our solar system?

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