free-fall time


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free-fall time

The time it would take for a system to collapse in upon itself under force of gravity if it were not supported by either pressure or rotation.
References in periodicals archive ?
Because of the long free-fall time, we practised different formations to get the best image.
temperature, says Blumenthal, would be divided into two regions: one in which the cooling time is greater than the free-fall time (that is, the time it takes gravity to collapse the mass into a galaxy), the other in which the free-fall time is greater than the cooling time.