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동영상 내용 중 수정 사항
21" 태양의 나이: 50억 년 ⇒ 46억 년
26" 구성성분: 수소(92.1 %), 헬륨(7.8 %) ⇒ 수소(74.9 %), 헬륨(23.8 %)
https://youtu.be/ilKfYEhxBqs
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https://youtu.be/_1eKL51oXZE
https://youtu.be/8VZHym6HqVU
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