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The sun is the largest object in Earth's neighborhood, but it is only medium size compared

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It plots the surface temperatures and brightness of different classes of

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Nuclear fusion causes atoms to combine, giving off huge amounts of heat and light energy.

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Gravity is a force that pulls together objects that have mass.

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A nebula is a very loose mass of cosmic dust and gases.

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A star is giant ball of burning gases.

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A galaxy is a system of stars, dust, and gas held together by gravit

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All of outer space and the matter and objects within it make up the universe.

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6.) Using Light to Determine Distance LIGHT YEAR

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6.) Using Light to Determine Distance LIGHT YEAR

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one light year is equal to the distance that light travels in a year.

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the layer of air that surrounds Earth.

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An area where there is no matter.

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Distance from one high point to the next.

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Light energy travels as electromagnetic waves. Like sound waves and water waves, ER waves move away from a source and carry energy

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All of the different kinds of light together make up the electromagnetic spectrum, or EM spectrum