klutedavid
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- Dec 7, 2013
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One estimate of the age of HD 140283.With a spectroscope. That's the usual way to measure the abundances of a star. (Sample-return missions being a *bit* inconvenient.) And the proper name of the star is HD 140283.
If you really want to see the details on the abundances, one (of several) papers that measure it is:
Nissen, P. E., Primas, F., Asplund, M., & Lambert, D. L. 2002, A&A, 390, 235
In 2000, scientists sought to date the star ( using observations via the European Space Agency's (ESA) Hipparcos satellite, which estimated an age of 16 billion years old. (space.com.how-can-a-star-be-older-than-the-universe.html)
Using known distances of 50 galaxies from Earth to refine calculations in Hubble's constant, astronomers estimates the age of the universe at 12.6 billion years.
See if you can reconcile 16 billion years with 12.6 billion years, by understanding the degree of error in each measurement?
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