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hubble's constant

n.
1.(cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer

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    Idiom of the Day

    with both hands tied behind one's back
    easily
    My friend can fix bicycles with both hands tied behind his back.



    1.
    Felix felt that his mother’s request to run her errands was a huge ________ since he would have rather watched a soccer match with his friends that afternoon.

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    Ohio is listed as the 17th state in the U.S., but technically it is Number 47. Until August 7, 1953, Congress forgot to vote on a resolution to admit Ohio to the Union.      .. More >>
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