The State of the Universe... ...New Steps in Expanding our Knowledge
IT’S IN fine shape. Flat. That is, it conforms to Euclid’s ancient laws of geometry, as modified 2200 years later for Einstein’s relativity and spacetime. At its expansion rate of 73 kilometers per second per megaparsec (a megaparsec equals 32.6 million light-years), over the past year the Universe and its expanding spacetime has increased its ‘size’ by 0.0000000073 percent. Of course we don’t really know its ‘size’ — the term really refers to the separation scale among the things we can see.
KeywordsBlack Hole Dark Matter Dark Energy Neutron Star Cosmic Microwave Background
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