[TOEFL 공부일지] Listening Lecture #2 - Astronomy: Saturn Rings

내용 / 위치

• Listening / Lecture / Astronomy / 232 - 233
• Saturn Rings

단어 공부

• Neptune: 해왕성
• Uranus: 천왕성
• encircle: 둘러싸다
• moon: 위성
• gazillion: 엄청난 수 
• tidal force: 조석력
• spiral down: 나선형을 그리며 강하하다
• Precisely: 정확해
• low mass: 낮은 질량
• Not so fast: 너무 서두르지마
• helium: 헬륨

문장 표현 공부

• We've been looking at some of the remarkable images of Saturn that have been transmitted to Earth by the Cassini-Huygens spacecraft.
• particularly with regard to its most distinctive feature
• This led to initial speculation that the rings existed in a liquid state.
• If these rings were liquid or solid, they would have broken apart long ago.
• A moon couldn't be responsible.
• You would end up with rings that contain large amounts of both rock and ice.
• A new theory - which, by the way, also involves a moon - has recently emerged.