NASA warns that Earth’s center of mass is not fixed and shifts in step with the seasons. Multiple reports say this motion is a natural, ongoing effect tied to changes in the planet’s distribution of land water, ice, and atmospheric conditions.
The outlets describe the potential implications for technology that relies on precise positioning. They note that satellite-based positioning and navigation systems could be affected if shifts in the center of mass are not accounted for in models and calculations. The reports frame the issue as a calibration and accuracy concern rather than an indication of a sudden disruption.
Both sources present the warning in similar terms, emphasizing that the center of mass movement happens continuously and repeats annually. They differ mainly in headline emphasis and wording, but they align on the core point: Earth’s center of mass varies with seasonal cycles and is relevant for maintaining accuracy in satellite positioning and navigation.
