Accelerating universe



accelerating universe

A phrase used to refer to the discovery that the Hubble expansion is not slowing down, as one would expect if only gravity were acting on the galaxies, but is actually speeding up as time goes by. (See dark energy.)

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  • Acceleration

    the act of ; increase of speed or velocity. a change in velocity. Mechanics. the time rate of change of velocity with respect to magnitude or direction; the derivative of velocity with respect to time. Contemporary Examples This leaves room for some acceleration of the pace of withdrawals, an option the White House is reported […]

  • Acceleration clause

    a provision of a mortgage, loan, or the like that advances the date of payment under certain circumstances.



  • Acceleration coefficient

    the ratio of change in capital investment to the change in consumer spending.

  • Acceleration of free fall

    noun the acceleration of a body falling freely in a vacuum near the surface of the earth in the earth’s gravitational field: the standard value is 9.806 65 metres per second per second or 32.174 feet per second per second g Also called acceleration due to gravity, acceleration of gravity



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