einstein theory of gravity flaw

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Offline johnp

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einstein theory of gravity flaw
« on: 08/01/2015 21:33:55 »
hi so if the universe is a fabric,and the planets ets bend the fabric and create gravity,if you take a very long fabric and you put randomly objects on it as the time past they tend to gather in the middle of fabric but the universe do not contract it expands!!

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Offline jeffreyH

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Re: einstein theory of gravity flaw
« Reply #1 on: 09/01/2015 00:51:28 »
What you have described is a gravity well. If instead you place all the objects in the centre of the fabric and raise the central point all the objects will move away from each other. So in this case you will have a dark energy hill.

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Offline PmbPhy

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Re: einstein theory of gravity flaw
« Reply #2 on: 10/01/2015 06:03:54 »
Quote from: johnp
hi so if the universe is a fabric,...
Which it isn't. Cosmologists merely use an analogy relating spacetime to a fabric in order to more easily describe the curving of spacetime. But in no real sense is the universe a fabric of any kind.