NASA team studies middle-aged sun by tracking motion of Mercury

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NASA team studies middle-aged sun by tracking motion of Mercury

(NASA/Goddard Space Flight Center) Like the waistband of a couch potato in midlife, the orbits of planets in our solar system are expanding. It happens because the Sun’s gravitational grip gradually weakens as our star ages and loses mass. Now, a team of NASA and MIT scientists has indirectly measured this mass loss and other solar parameters by looking at changes in Mercury’s orbit.

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