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 special examination of urine, Explain the Special Examination o...

Explain the Special Examination of Urine The special examination requires the determination of various chemical substances in the urine including amino acids, bile pigments and

Explosives-storage of chemicals, Explosives : As defined earlier, explosiv...

Explosives : As defined earlier, explosives release a large amount of gas and energy in a very short time. These are of four basic types: Mixed gases - Usually the mixture

Explain the pancreas, Explain the Pancreas The pancreas is a gland that...

Explain the Pancreas The pancreas is a gland that lies immediately below the stomach, surrounded by the loop of duodenum. The bulk of the pancreas is composed of pancreatic exo

Fetus, Few sentences about fetus in human being? Definition, development, &...

Few sentences about fetus in human being? Definition, development, & important notes?

Assign wk3, Briefly explain why it is important to reinforce alternatives t...

Briefly explain why it is important to reinforce alternatives to problem behavior when using a punishment procedure. Give one example of the use of both a punishment procedure

Balanced diet, Balanced diet: We have dealt with quality and quantity o...

Balanced diet: We have dealt with quality and quantity of food. Both of  these should be balanced in a diet. A balanced diet is a combination of various foods which can fulfil

What is the important role of vitamin k, What is the important role of Vita...

What is the important role of Vitamin K Vitamin K , as you may already know, is a fat-soluble vitamin that plays an  important role  in  blood  clotting. It was  first observe

Procedure for sterilization of glassware, Procedure 1. Soak the emptied...

Procedure 1. Soak the emptied glassware in disinfectant or liquid soap solution overnight. If you use disinfectant, dip the glassware in soap solution before washing, Rub clean

Making a simple reflecting telescope, Making a simple reflecting telescope ...

Making a simple reflecting telescope A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitabl

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