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Mercury Helps Reveal Our Middle-Aged Sun’s Secrets

    Mercury Helps Reveal Our Middle-Aged Sun’s Secrets By Judith E Braffman-Miller About 4.56 billion years ago, our Solar System was born from the relic, shredded fragments left behind by the long-dead, nuclear-fusing furnaces of previous generations of ancient stars. Today, our Sun is a lonely sphere of roiling, glaring, mostly hydrogen gas, but it probably was not always…

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