Testing Newton's gravity theory
Duration: 05:43
Although Newton's Law of Universal Gravitation is a good approximation of gravity, more precise measurements of the Moon's orbit show it is not a perfect explanation.
Available since: Thu 12 Aug 2010
This clip is from
Horizon 2007-2008, What on Earth is Wrong With Gravity?
Dr Brian Cox believes that the answer to the meaning of the universe lies in gravity.
First broadcast: 29 Jan 2008
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