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Originally Posted by Popular
How many dimensions are there in the Universe?
What gravity is, is a distortion of the three regular dimensions, in some other dimension that you don't otherwise notice. The analogy is a bowling ball weighing down a rubber sheet.
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You do something very dangerous here; namely taking an analogy literally. The bowling ball picture is something we can understand and therefore it is insightfull; However you should keep in mind that it is not what realy happens. space gets curved; but not 'in a certain direction' as is the case with the bowling ball. Curved space realy means that straight lines are not straight anymore (as compared to the 'flat' space case); that a unit length is not the same everywhere; that the angles of a triangle don't add up to 180 degrees; etc.
Bo
