1sun

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**__Sun__**

**__The Solar System__ **

Most of the solar system consist of stars. It is know that between the stars, space is permeated by gas in a very varified state, much of the gas occurs in clouds that are discerned by virtue of the fact that they containe very fine dust particles.



**__The Sun__**  The sum is the center of the solar sytem. The radiuse of the solaer system is 695,970 Km. The sun also has a mass that is 1.939x10 to the 30th power Kg. Astronemers think that the sun and planets were formed 5 billion years ago from an interestellar cloud of molecular hydrogen.



**__Important Information on the sun__** 

The age of the sun is abour 4.7x10 to the 9th power years old. The temprature of the sun's core is about 15.6x10 to the 6th power kelvin, the sun's temprature on the surface is about 6400 kelvin.The sun's luminosity is 3.85x10 to the 23rd power Kw. The rotation of the sun is 25 days ( equater) 35 days ( lattitude 70 degrees) The sun is a composed principal of hydroegen with about 10% by number of helium and a few percent of other elements such as carbon (8.2%), nitrogen (8.4%), oxygen (8.7%), neon (8.0%), magneisum (7.5%), silicon (7.4%), sulfur ( 7.0%), iron (7.7%).



__**Solar eclipse

**__ A solar eclipse is when the sun blocks out the moon. It is not safe to look at theis eclipse.

**__

Quick Facts __**


 * 1. The sun is a spherical symetric and has a specified chemical somposition and mass
 * 2. The sun neither ganes or loses mass during it's evolution
 * 3. The interior gas of the sun is static.
 * 4.The sun has no diffusion occurs between zones os dissmilar composition.
 * 5. The sun reaches 1-2 million kelvin in the inner corona.
 * 6. The sun is one of over 1 billion stars in the milky way galaxy.
 * 7. The sun is 25,000 light years away from the galaxy.
 * 8. The sun revolves around the galactic center once about every 250 million years.
 * 9. The part of the sun that we see has a temprature of 5500 degrees celsius ( 10,000 degrees fehrenheite)
 * 10. The sun is a star with a diameter of aproximatly 864,000 miles (1,390,000 kilometers)



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 * __Bibliography __**
 * 1.Page Last Updated:November 29, 2007 Page Editor:Brian Dunbar NASA Official:Brian Dunbar
 * 2. Paule.R.Weissman,jet Propusion labratory,California institute of technology pascdene,Cali

**__For more information go to theses links__** [|www.wikipediaenclepedia.com] [|www.science.nationalgeograpgic.comwww.nasa.gov] [|www.nasa.gov]