The celestial holiday is celebrated through the ages as the “birth of the sun.” In Maryland, the sun will rise at 7:22 a.m. and set at 4:46 p.m., meaning there will be 9 hours and 26 minutes ...
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Long-sought measurement of exotic beta decay in thallium helps extract the timescale of the sun's birthThe radionuclides, all long decayed since the birth of the sun 4.6 billion years ago, left their imprints as small excess abundances of the decay products in meteorites where they can now be detected.
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