Stars+-+Life+Cycle+-+EK

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Rubric: [[file:Space Exploration Adventure Rubric.doc]], [[file:Space Exploration Adventure Rubric.pdf]]

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starts life cycle || || Nebula=where stars are born
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 * ||  || [[image:http://www.nrc-cnrc.gc.ca/images/education/yellow_line.jpg caption="yellow line"]]
 * ||  || [[image:http://www.nrc-cnrc.gc.ca/images/education/yellow_line.jpg caption="yellow line"]]

**Works Cited** **Sources** : Include the source information for all of the magazine articles, reference sources (encyclopedias) and web site pages that were used to complete your project. The source information for encyclopedias may be found at the end or beginning of each entry in iCONN. When using periodicals, the publication information will be at the beginning or end of the article. This needs to be formatted for MLA standards. If it is not labeled 'Source Citation' it can be formatted appropriately by using EasyBib.com. You should use EasyBib for the web sites. The final Works Cited should be listed in alphabetical order by the first word of the source citation. "Milky Way." //Kids InfoBits Presents: Astronomy//. Gale, 2008. Reproduced in Kids InfoBits. Detroit: Gale, 2012. "The Milky Way." //WMAP's Universe//. NASA, 28 June 2010. Web. 06 Mar. 2012. . Vergano, Dan. "Galaxy Bracketed by Big Bubbles." //USA Today// 10 Nov. 2010: 05A. Web. 6 Mar. 2012.
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 * Topic: Research Focus**


 * What is your topic?**
 * State the focus of your research:**
 * My topic is theLifecycle of stars.**
 * how stars are born, how they die, and how long they live.**

**Notes** ==== Include notes, statistics and facts that you will use to write your final paper. You may want to label sections of your notes to help you be more organized as you write. As you take notes from a source, you should list the source citation in the Works Cited section above. ====

Our sun is about 1 billion stars in the milky way galaxy Stars are constantly changing stars life lasts billions of years life cycle of a star is called steller evolution star is born when hot clouds of gas and dust condencend in space. when a cloud gets hot and dense enough fusion of hydrogen into helium begins to occur, producing starlight. if a star has lots of hydrogen fule it will continue living and shining when hydrogen levels in a star runs low it begins to die

depending on the star it can die 2 ways

the first way is an average size star (like the sun) will spend the last 10% of its life as a "Red Giant" the temprature in the star drops 3,140 and 6,741 degrees fahrenheit and the diameter will expands ten to one thousand times (that of the sun) and the star takes a reddish color (thats how this process gets its name) Buried deep inside the star is a hot dense core about the size of the earth and helium left burning at the core called a "White Dwarf" is left to cool for eternity. The first white dwarf was discover by Eridani B

For the second opition the star has to be 1.44 times bigger than the sun which is called the Chandrasekhar limit this process is that once the star runs out of fuel it will go into a supernova loosing most of its mass in mot cases the star will end up as an extremly dense neutron star. scientists and physists predicted that for the most massive stars 2 or 3 times bigger than the sun the gravitational collapse of the supernova is so complete, that only a black hole remains. A black hole is a single point in space where pressure and density are infinite in toatal the sun's steller evolution will be about 14 billion years-so there us nothing to worry about

Emission Nebulae emit their own light

Emission nebulae usually have young stars within their gas clouds. This type of nebula soaks up energy and heat from these stars. Since these stars are so new, they are extremely hot and emit ultraviolet radiation. All this radiation supercharges the hydrogen in the nebula gas cloud. This causes the nebula to glow brightly, like a neon sign, thus creating and emitting its own light.

A blue relfection nebula is completely different from an emission nebula. This is because rather than emitting their own light, they are reflecting the light of the stars around them. Remember: A blue nebula is called a reflection nebula. It scatters the blue light from nearby stars while the rest of the colors are allowed to pass through the cloud undisturbed. Eventually the blue light escapes the cloud and travels to our eyes.

Stellar Evolution is driven entirely by the never ending battle between pressure and Gravity As imbalances are reached, the star is driven to find a new energy source. Each new stage in stellar evolution is hence marked by a different energy generation mechansism.