- Jan 10, 2010
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That is simply an assumption based on time and speed so is nothing that is measurable.The current radius of the observable universe is about 46 billion light years (so I guess we can measure it). At some point it will be exactly 47 billion light years. That's pretty set as distances go. I'll admit that it won't be exactly that size for long and we won't know the exact time it gets there (we won't be here), but it will be that exact size.
https://upload.wikimedia.org/wikipedia/commons/e/e7/Observable_universe_logarithmic_illustration.png
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