Have you seen the new theory that suggests that universe expansion isn't actually accelerating, but that it's only due to time dilation?
https://phys.org/news/2014-12-alternative-explanation-dark-energy.html#ajTabs
New Dark Energy Theory
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https://www.msn.com/en-us/news/technology/new-study-blows-dark-energy-theory-to-bits-says-universe-expansion-is-lumpy/ar-AA1wdWGc?ocid=winp2fptaskbarhover&cvid=fe2585054ae745b6a5515c734a176f1f&ei=19