NASA Earth(@NASAEarth):If Earth were a hard marble, its center of mass would stay in the middle – but in reality, the center shifts as seasons move water, ice, and air around the planet. NASA scientists developed a new way to track these motions more precisely, helping improve mapping and navigation.

NASA Earth

@NASAEarth

NASA’s favorite (habitable) planet. 🌎💚 Studying Earth from ground to orbit.

参加 March 2009

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NASA Earth@NASAEarth

2026.09.16 19:10

If Earth were a hard marble, its center of mass would stay in the middle – but in reality, the center shifts as seasons move water, ice, and air around the planet. NASA scientists developed a new way to track these motions more precisely, helping improve mapping and navigation.