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Published on Aug 18, 2018
Unlike the Earth, the universe might actually be flat! But how do scientists know that, if we can’t observe it?
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Read More: What is the Shape of the Universe? https://www.space.com/24309-shape-of-... “Scientists have calculated the ‘critical density’ of the universe. The critical density is proportional to the square of the Hubble constant, which is used in measuring the expansion rate of the universe.”
Universe 101 https://map.gsfc.nasa.gov/universe/un... “Thus the universe was known to be flat to within about 15% accuracy prior to the WMAP results. WMAP has confirmed this result with very high accuracy and precision.”
Why is the Universe flat and not spherical? http://curious.astro.cornell.edu/abou... “Why does the Universe look flat? This was one of the perplexing questions in cosmology for a long time. Today, most astronomers believe in the theory of inflation (and there are pieces of evidence supporting this).”
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