How Do We Map The Earth’s Gravity?

Can Earth’s center of gravity be located? And if so, to what precision?
Satellite measurements offer scientists a new view of our planet. Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity. Image credit: NASA's Goddard Space Flight Center

Satellite measurements offer scientists a new view of our planet. Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity. Image credit: NASA's Goddard Space Flight Center

Earth’s center of gravity can be located! We talked a few months ago about measuring the force of gravity surrounding the Moon, and that the way we do this measurement is by having twin satellites, and calculating the difference in gravitational pull...

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