Solar System Flashcards

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1
Q

Nebula

A

a large cloud of gas and dust in interstellar space; a region in space where stars are born or where stars explode at the end of their lives

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2
Q

Solar Nebula

A

the cloud of gas and dust that formed our solar system

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3
Q

Nuclear Fusion

A

the combination of the nuclei of small atoms to form

a larger nucleus; releases energy

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4
Q

Sunspot

A

a dark area of the photosphere of the sun that is cooler than the surroundng areas and that has a strong magnetic field

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5
Q

Astronomical Unit

A

the average distance between te Earth and the sun; approximatley 150 million kilometers

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6
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