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1
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What do young solar nebula's do?
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2
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What is a cloud of gas and dust that formed our solar system called?
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3
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After how many years does the amount of sunspot cycle reach its end?
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4
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What happens to the remaining gas and dust when a star is born?
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5
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What is at the center of the sun, where the energy is produced?
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7
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In what zone do gases circulate?
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10
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What is the sun not doing?
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14
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What is Einstein’s formula for energy and matter?
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15
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What is the sun doing?
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16
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What is the sun made of?
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17
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What are cooler dark spots of the photosphere called?
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18
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Where does Nuclear Fusion take place?
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