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kepler's third law

n.
1.a law stating that the ratio of the square of the revolutionary period (in years) to the cube of the orbital axis (in astronomical units) is the same for all planets

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    Idiom of the Day

    go together
    to look or sound or taste good together
    The red paint and the green sofa do not go together in the apartment.



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    As Mr Andrews was about to leave he found a note pinned to his door. It was from Mary Smith advising him to be careful because she has just bought a ________ young guard dog.

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