Word: ageing
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Dates: during 1990-1999
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While astronomers earlier had a less accurate estimate of the Hubble constant, the team's work has provided a narrower estimate--and thus a better estimate of the universe's age...
Combined with the best current measurements of the universe's density, the Hubble constant led scientists to their estimate of 12 billion years for the universe's age...
Knowledge regarding the age of the oldest stars supports the new finding...
...reason why we might think this estimate is true and not just a myth is because when we look at...systems of stars, we can estimate the age of the oldest stars, and those seem to come in at around 11 to 15 billion years old," Kirshner said...
...Hubble constant and the acceleration of the universe are both necessary to estimate the age of the universe, Kirshner said...