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

AVES, classes of aves

classes of aves

Define the role of bacteria in soil flora, Define the role of Bacteria in s...

Define the role of Bacteria in soil flora The most abundant soil organisms are primitive, very minute, unicellular organisms devoid of chlorophyll. Bacteria are most abundant i

Determine the equilibrium conditions of energy deposition, Compute for 3 H...

Compute for 3 H the mean energy per nuclear disintegration, Δ. The SI unit for Δ is kg Gy Bq -1 s -1 identical with J Bq -1 S -1 . The effective half-life for tritium in body w

Density, what is 698 to nearest 10ml

what is 698 to nearest 10ml

To show how water rises in fine tubes, To show how water rises in fine tube...

To show how water rises in fine tubes Make some fine hair or capillary tubes by heating glass tubing in a flame and drawing it out. Cut the tubes and glue them to a piece of c

Food chain, Food Chain: As you know from the discussion of the previous...

Food Chain: As you know from the discussion of the previous subsection, one of  the ways in which the organisms are  related is through food, that is, one organism becomes food

Shannons theorem, We know from Shannon's Theorem, Maximum data rate of a ch...

We know from Shannon's Theorem, Maximum data rate of a channel in bps (B) = Hlog2 ( 1+S/N ) _ 1 Where H = bandwidth in Hz S/N = signal-to-noise ratio We also know that Db = 10log10

Food fads, Food fads: You may have picked up the idea from your family ...

Food fads: You may have picked up the idea from your family or friends  that certain combinations of food can  be dangerous  for your  health. For example,  fish and milk or ra

#fatty acid biosynthesistitle.., Ask quesdifference between prokaryotic and...

Ask quesdifference between prokaryotic and eukaryotic fatty acid synthesistion #Minimum 100 words accepted#

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