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

Egg or chicken, what comes first? egg or chicken?

what comes first? egg or chicken?

Residence time, If the Quabbin Reservoir Watershed is 100 km2, the average ...

If the Quabbin Reservoir Watershed is 100 km2, the average precipitation in New England is 130 cm/year, and the volume of the reservoir is 1.5 x 1012 liters, what is the residence

How is harvest maturity identified, Q. How is harvest maturity identified? ...

Q. How is harvest maturity identified? Maturity indices can be determined on the basis of : Number of days from setting, Sight-colour, size and shape, Touch-texture, hardness o

Describe physical properties of amino acid, Physical Properties of Amino ac...

Physical Properties of Amino acid:- Solubility : Amino acids are readily soluble in water, slightly soluble to insoluble in ethanol and insoluble in ether. Tyrosine  is solubl

Mode of Nutrition, Ask question #Minimum 1000 words accepted#

Ask question #Minimum 1000 words accepted#

Enumerate in brief about the earthworms, Enumerate in brief about the Earth...

Enumerate in brief about the Earthworms There are several species of earthworms, having slender cylindrical bodies with varying diameters. These organisms ingest the dead organ

Semiconductors, Semiconductors: By now you have studied more than half ...

Semiconductors: By now you have studied more than half of  this course. You may have been to the study centre a few times. You might have taken lessons on audio  cassette-recor

Animals, what are the kinds of animals?

what are the kinds of animals?

Laser, LASER stands for Light Amplification by Stimulated Emission of Radia...

LASER stands for Light Amplification by Stimulated Emission of Radiation: It's a fairly long string of words. Well, don't  let it stop you  from reading further. What we wish t

Determine about the plant-available soil moisture, Determine about the Plan...

Determine about the Plant-Available Soil Moisture  Plant available soil moisture or total available water is the difference between the amount of water held in the plants root

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