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Earth's center of mass shifts every year with rainfall and snowmelt
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Earth's center of mass shifts every year with rainfall and snowmelt

So here's something fascinating - NASA scientists have discovered that Earth's center of mass actually shifts by a few millimeters every single year, all because of seasonal water and air movements. The shifts happen thanks to snowmelt, rainfall, atmospheric pressure changes, and ocean variations, and while we can't feel it, it turns out this tiny movement matters quite a lot for satellite navigation. What's really interesting is that researchers at NASA's Jet Propulsion Laboratory developed a much more precise way to measure these shifts using ultra-precise satellite tracking and GPS data, which gives us a clearer picture than we had before. Their findings suggest that the annual shifts are about twice smaller than scientists thought back in 2017, meaning less water and air actually moves between hemispheres than previously assumed.
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