2blackholes2



//[[image:uesc_09_img0541.jpg align="right" caption="star cycle"]]The amazing star cycle//
 **There are many different types of stars that have a variety of size,mass,and gas. These three components determine the outcome and fate for these stars.All stars are born the same way, a nebula. A nebula is a interstellar cloud of dust made from hydrogen and plasma. Usually comes from the death of another star. stars usually start out as protostars. Later on in the life cycle [or star cycle], these young forms later collapse and form the main sequence. Stars can turn out two ways depending on the size and mass. When small and medium size stars expand, they soon become a red giant. While the star is slowly growing, its also burning hydrogen. The larger a star is, the more hydrogen a star burns. Therefore, the bigger the star is, the quicker it would die out. Because it burns gas faster. After a red giant burns out hydrogen ; which usually take 5 to 10 billion years, it would become a planetary nebula. If this was a large star then it would be a red super giant that would explode into a supernova. At the end of the life cycle, small and medium type stars would end up as a white dwarf of a black dwarf. However, larger stars have a more intense fate. For they may turn into a neutron star or a black hole. A invisible force in face that in which gravity is so powerful not even light can escape.**


 __**Black Holes **__

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 * A black hole is a powerful gravitational pull in space that is so powerful that not even light can escape. As explained in the star cycle, black holes happen when a super red giant burns out creating supernovas. However black holes are not visible to the naked eye but there . The center of a black hole bends time, slowing it down and speeding it up as it wish. For example, if you falling into a black hole, you would feel as if your slowly down as you get closer to the center. However someone who was watching this ,would think it would go by quickly and time would go faster as time for your would get slower. At one point when you get to the very center it says that time stops completely. Either way you'll probably be dead due to the gravitational force pulling your body violently and your muscle tension ripping apart. Plus any remaining atoms and mocleus that was once into your body would be sucked into the black hole

**More facts:**

1**] If our sun suddenly became a black hole. Not much would change. In fact we may actually survive. OK I'm lying but wouldn't that be cool?![say no] Seriously, if the sun was to become a black hole not much would change compare what you see on TV. We probably wont get sucked in unless we was extremely close due to the weight of time. However the earth would be a lot colder and their would be no light at all. Which pretty much means there would never be daytime, just night. However the earth would soon become a layer of ice. There a possibility we may survive if we humans suddenly decide to live underground with heat and electricity. Yet again that probably wont happen since the sun wont become a black hole. ** **2]** **Although black holes are not visible they probably weight over several billions of tons due to its large about of gravitational pull and its** **highly amounts of mass thats probably not even measurable. '**

**3] There has been proof that there are even spinning black holes that have several event horizons called the "eropshpere" also a "inner sphere and outer sphere" .**  <span style="background-color: rgb(255, 255, 255);">4**] Even though black holes have a high about of mass, its actually very small. only having the radius of two million kilometers. which is small considering its strong gravitational pull** **.** <span style="color: rgb(82, 235, 87);">**5] Many black holes live in binary star systems. Sucking in their neighboring star,as the star would grow smaller the black hole would grow bigger.Eventually black holes die because they radiate. Most people think black holes are the color black, but in reality; black holes radiate small particles making them a whitish color. However we cannot see it and this is on a quantum mechanics level.**

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<span style="color: rgb(164, 0, 255); font-size: 110%;">Links and sites
http://aspire.cosmic-ray.org/labs/star_life/starlife_main.html http://library.thinkquest.org/21008/data/star/cycle.htm

http://imagine.gsfc.nasa.gov/docs/science/know_l2/black_holes.html http://cosmology.berkeley.edu/Education/BHfaq.html

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