the universe is infinite,who can explai it by the best way?
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The simplest cosmology that fits the large-scale characteristics of the universe is the so-called Friedmann—Lemaître—Robertson—Walker cosmology describing a spacetime that is homogeneous (same everywhere) and isotropic (has no preferred direction).
This simple cosmology is characterized, among other things, by a variable that represents spatial curvature. It can be positive, negative, or zero.
Our best observations to date strongly suggest that the universe has no spatial curvature. It may be expanding in time, but the geometry of space, at any given time, is Euclidean.
The simplest topology that corresponds to Euclidean geometry is that of flat, infinite space. So by Occam’s razor, i.e., the parsimony of assumptions, we can conclude that in the absence of evidence to the contrary, the universe appears infinite
This simple cosmology is characterized, among other things, by a variable that represents spatial curvature. It can be positive, negative, or zero.
Our best observations to date strongly suggest that the universe has no spatial curvature. It may be expanding in time, but the geometry of space, at any given time, is Euclidean.
The simplest topology that corresponds to Euclidean geometry is that of flat, infinite space. So by Occam’s razor, i.e., the parsimony of assumptions, we can conclude that in the absence of evidence to the contrary, the universe appears infinite
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