Black Holes

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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 of galaxy found

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Contains little gas and dust

Most are dim and difficult to see

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Spiral

Dense center with spiral arms

Bright and easy to see