Search "+Carl Sagan"
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- 0.152 + - Dark matter
- 0.143 + - The Scale of the Universe
- 0.078 + - Iron
- 0.072 + - Solar System
- 0.071 + - Drake equation
- 0.071 + - November 9
- 0.071 + - Neil deGrasse Tyson
- 0.071 + - 칼 세이건
- 0.071 + - Science
- 0.071 + - 과학자가 되는 방법
- 0.071 + - Universe
- 0.071 + - December 20
- 0.071 + - United States
- 0.071 + - Contact
- 0.071 + - 1934
- 0.071 + - Cosmos: A Personal Voyage
- 0.071 + - Cosmos
- 0.071 + - 1996
- 0.068 + - 빛의 속도에 가깝게 우주여행한다면
- 0.066 + - Cosmos: A Spacetime Odyssey