THE SUN
 HOME     ASI       ESA      NASA     ROSAVIAKOSMOS    HUBBLE    SATELLITES    ISS   PROPULSION    GALLERY 
SPACE ///  THE GALAXIES   THE STARS    SOLAR SYSTEM   INNER PLANETS  OUTER PLANETS   THE SUN

The Sun is composed of a core of about 150000 km radius and mass approximately 40% of the total where are the thermonuclear fusion of hydrogen. Currently it has been consumed approximately 39% of hydrogen. The nucleus is enclosed by a radioactive area 300000 km thick with smaller values of pressure and temperature of plasma in which the energy propagates in the form of radiation. Away from the center of the Sun through the convective region of 250000 miles thick where we encounter large cells of plasma convection currents. Finally we meet the photosphere which is the solar surface 400 km thick and temperature about 6000° k. Here we observe the phenomena of stains and granulations. The solar atmosphere consists of the Chromosphere that is a layer of high plasma 10000 miles where the phenomena of spicules, starch, flocs and flares 500000 temperature solar° k. The Crown is the top of the atmosphere which radiates the solar wind which propagates throughout the solar system. The temperature rises to 5000000° K and are observable phenomena such as the prominences and filaments.

Soho

  

 

 NASA

                        

                                                                                SUN 

 

Mass

1.99 x 1030 Kg

 

Equatorial rotation period

25 days ago

Equatorial Radius  

7 x 105 Km

Tilt the Equator than the ecliptict

7° 15 '

Average distance from the Earth

1,496 x 108 Km

 

 

 

 

 

 

    Trace 

The Sun takes 25 days to complete a full circle at the Equator where speed is maximum. The differential rotation or the different speeds at different latitudes, is one of the basic elements to understand the complex solar phenomenology. The solar cycles vary between 7 and 15 years and are superimposed. At the beginning of the cycle which corresponds to a minimum of observable activities, we note a few spots near the equator in the old cycle with other spots at 40° latitude of the new cycle. Stains enhance and migrate to the 15° of latitude. Then tend to decline going towards the Equator with a few new spots that are formed between 4° and 10°. At the same time a new cycle has begun with the appearance of stains on 40° latitude. Also the magnetic field is cyclic with a reversal of the Poles.

 Under-solar cycle

 HOME     ASI       ESA      NASA     ROSAVIAKOSMOS    HUBBLE    SATELLITES    ISS   PROPULSION    GALLERY 
SPACE ///  THE GALAXIES   THE STARS    SOLAR SYSTEM   INNER PLANETS  OUTER PLANETS   THE SUN
                                                                                   ARTISTIC AND LITERARY PROPERTY RESERVED