| A continuous spectrum with dark lines superimposed |
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| A bright display of ever-changing light caused by solar radiation interacting with the upper atmosphere in the region of the poles |
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| The bright lines produced by an incandescent gas under low pressure |
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| The property of a lens whereby light of diffrent colors is focused at diffrent places |
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| The first layer of a solar atmosphere found directly above the photosphere |
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| An uninterrupted band of light emitted by an incandescent solid, liquid, or gas under pressure |
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| The outer, tenuous layer of the solar atmosphere |
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| a continuous spectrum with dark lines superimposed |
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| The apparent change in wave-length of radition cause by the relative motions of the source and the observer |
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| The transfer of energy through space by electromagnetic waves |
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| The bright lines produced by an incandescent gas under low pressure |
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| The fine structure visible on the solar surface caused by convective cells below |
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| The source of the Sun's energy |
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| A discrete amount of electromagnetic energy |
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| The region of the Sun that radiates energy to space |
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| A concentration of material aboce the solar surface that appears as a bright archlike structure |
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| A chain of thermonuclear reactions by which nuclei of hydrogen are built up into nuclei of helium |
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| The force exerted by electromagnectic radiation from an object such as the Sun |
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| Two or more radio telescopes that combine their signals to achieve the resolving power of a larger telescope |
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| telescope designed to make observations in radio wavelengths |
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| A telescope that concentrates light from distant objects by usinf a concave mirror |
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| A telescope that employs a lens to bend and concentrate the light from distant objects |
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| A sudden eruption in the solar chromosphere |
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| An instrument for directly viewing the spectrum of a light source |
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| narrow jet of rising material in the solar chromospheres |
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The Nine Planets 
Digits of Pi 
Multiplication Table
