Black+Holes+-+SB

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

 * Written Information **: A black holes gravity is so strong that not even light can escape it. Most scientists believe there is a black hole in the center of our very own milky way. If something gets pulled in to a black hole it is never seen again. Black holes are not really holes at all they are just called that because it is what they look like. Black holes are formed when giant stars

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 * [[image:http://images.nationalgeographic.com/wpf/media-live/photos/000/012/cache/unexpected-x-rays_1269_600x450.jpg width="262" height="316" caption="The Columbia Encyclopedia, 6th ed. Columbia University Press, 2000."]] || [[image:http://images.nationalgeographic.com/wpf/media-live/photos/000/008/cache/black-hole-wind_840_600x450.jpg width="258" height="348" caption="Hot gas escaping from a black hole"]] || [[image:http://chandra.harvard.edu/photo/2006/bhcen/ngc4472_115.jpg width="280" height="280" caption="Kids info bits presents: Astronomy Gale 2008" link="http://chandra.harvard.edu/photo/2006/bhcen/"]] ||
 * || //Kids InfoBits Presents: Astronomy//. Gale, 2008 ||  ||

**Works Cited** **Sources** : "Black Holes." //Kids InfoBits Presents: Astronomy//. Gale, 2008. Reproduced in Kids InfoBits. Detroit: Gale, 2012. http://galenet.galegroup.com/servlet/KidsInfoBits

High Energy Astrophysics Science Archive Research Center (HEASARC), [|Dr. Alan Smale (Director)], within the Astrophysics Science Division (ASD) at NASA/ GSFC.

"Black hole." //The Columbia Encyclopedia//, 6th ed. Columbia University Press, 2000. Reproduced in Kids InfoBits. Detroit: Gale, 2012.

//Kids InfoBits Presents: Astronomy//. Gale, 2008.

**Topic: Research For Black Holes**

**Notes** Black holes are the cold remnants of former stars, so dense that no matter—not even light—is able to escape their powerful gravitational pull.

Most scientists believe that there is a [|black hole] in the center of our very own Milky Way.

Anything that gets pulled into a black hole is never seen again.

As the distance between them shrinks over 100 million years, the circling speed will increase until it approaches the speed of light, about 671 million mph (1080 million km/hr). The black holes will then collide spectacularly, spewing radiation and gravitational waves across the universe.

A black hole is formed when giant stars die and they undergo an explosion.

Black holes are invisible.

Black holes are not really holes at all. They are only called black holes because that is what they look like.

Even though black holes are invisible, scientists know they exist. Because a black hole has such high gravity, it pulls materials at high speeds toward it, like a powerful vacuum cleaner sucking up all the space debris. Scientists can see black holes by observing the material around it. For example, using powerful telescopes they can see these gases spiraling into the black holes.

The black hole theory was first proposed by a German astronomer named Karl Schwarzchild in 1915. His ideas were based on scientist Albert Einstein's theory of general relativity, which talks about how gravity and matter affect space. This theory continued to influence scientists as they studies black holes.

Scientists have found evidence of several black holes in the center of several galaxies. They have even found a black hole in our own galaxy. It has the mass of three million suns and is 24,000 light years from Earth. It is too far way to be dangerous.