as25 - of galaxy found Contains little gas and dust Most...

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Black  Holes
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Black Holes The intense  gravitational field left  when a giant star  collapses
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It is called a black  hole because not  even light can  escape
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Photon Sphere The outer edge  where light bends but  is still escapable
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Event Horizon The point at which  no light can escape
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Singularity The shrunken star  too small to be  measured but with  indefinite density
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Galaxies
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Galaxy A large assembly of  stars and nebulae 
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Group of Galaxies
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The Milky Way Our galaxy Flat disk with spiral  arms
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Three Types of  Galaxies
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Elliptical Oval shaped Most common type 
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Unformatted text preview: of galaxy found Contains little gas and dust Most are dim and difficult to see Spiral Dense center with spiral arms Bright and easy to see Contains large amounts of gas and dust always producing new stars Irregular No specific shape Contains large amounts of gas and dust Small and faint therefore hard to see Quasars Quasars Small, powerful source of energy thought to be cores of distant spiral galaxies They emit radio waves and bright light...
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as25 - of galaxy found Contains little gas and dust Most...

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