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์ฌ์ฑ๊ฒฝ
๋ ๋๊ทธ๋์ค ํ์ด์จ (Neil deGrasse Tyson), ๋๋๋ ๊ณจ๋์ค๋ฏธ์ค (Donald Goldsmith)
์นผ ์ธ์ด๊ฑด (Carl Sagan)
