Space – How old is the universe? Our answer keeps getting better (Popular Science)

  writes: In milliseconds, Google can serve up a fact that long eluded many of humanity’s deepest thinkers: The universe is nearly 14 billion years old—13.8 billion years old to be exact. And many cosmologists continue to grow more confident in that number. In late December of 2020, a collaboration of researchers working on the Atacama Cosmology Telescope (ACT) in Chile published their newest estimate, 13.77 billion years, plus or minus a few tens of millions of years. Their answer matches that of the Planck mission, a European satellite that made similar observations between 2009 and 2013

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