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=**OUR SUN**=



=**SIZE**= The Sun is by far the largest object in the solar system. From its angular size of about 0.5° and its distance of almost 150 million kilometers, its diameter is determined to be 1,392,000 kilometers. This is as much as 109 earths in diameters and nearly 10 times the size of the largest planet, Jupiter. The Sun contains an enormous gravity therefore all the planets orbit it. The sun's mass is 333,000 times the Earth's mass and is over 1,000 times as massive as Jupiter. Because of all that mass it is able to produce its own light. = = =Motion & Features= Sun on average 24 hours to go from noon position to noon position the next day. That why in some countries of the world the time is completely different. It makes one full circuit of 360 degrees in 365.24 days (really close to 1 degree or twice its diameter per day). This slide eastward is now known to be caused by the motion of the Earth around the Sun in its orbit. The apparent yearly path of the Sun through the stars is called the This circular path is tilted 23.5 degrees with respect to the celestial equator because the Earth's rotation axis is tilted by 23.5 degrees with respect to its orbital plane. The sun is at the center of the solar system. The surface of the Sun is about 5,500 Celsius. The Sun has been burning for about 4.5 billion years! That was since the beginning of earth.

=COMPOSITION= The Sun fully consist with gas and no solid surfaces as the earth does. The Sun is made up of many substances but the two main ones are, hydrogen, which takes up 94% and Helium which makes up 6% and all the other elements make up just 0.13% (with oxygen, carbon, and nitrogen the three most abundant ``metals''---they make up 0.11%).The Sun also has traces of neon, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, potassium, and iron.

3 major surfaces of the Sun are
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 * **Core**
 * **Radiative Zone**
 * **Convective Zone**

The sun consist of many elements.

 * Element || Abundance (% of total number of atoms) || Abundance(% of total mass ) ||
 * Hydrogen || 91.2 || 71.0 ||
 * Helium || 8.7 || 27.1 ||
 * Oxygen || 0.078 || 0.97 ||
 * Carbon || 0.043 || 0.40 ||

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Last Updated: May 29, 2009 >