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Why can't the weight of the earth be measured?

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Scientist Schlaminger also said that knowing the mass and distance between the spheres, Cavendish calculated the value of the gravitational constant. The International Science Council's Committee on Data currently sets this standard. Cavendish's original number was 6.74, which is now slightly reduced to 6.6743. Scientists have since used this value to calculate Earth's mass using other objects with known masses. More than two centuries have passed since Cavendish's experiments. That torsion balance method is still used today. We have to calculate with this apparent weight. The research or formula to tell the weight of the earth alone has not yet come out.

Source: Live Science

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