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    • 1770s

      • The mass of the Earth was first measured with any accuracy (within about 20% of the correct value) in the Schiehallion experiment in the 1770s, and within 1% of the modern value in the Cavendish experiment of 1798.
      www.wikiwand.com › en › Earth_mass

      Earth mass - Wikiwand

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  3. en.wikipedia.org › wiki › Earth_massEarth mass - Wikipedia

    The mass of the Earth was first measured with any accuracy (within about 20% of the correct value) in the Schiehallion experiment in the 1770s, and within 1% of the modern value in the Cavendish experiment of 1798.

  4. www.scienceabc.com › eyeopeners › know-mass-earthHow Do We Know The Mass Of The Earth? » Science ABC

    Oct 19, 2023 · The mass of the Earth was first calculated by Isaac Newton in his Principia Mathematica. The current estimate is only 1% more accurate than Cavendish’s groundbreaking work. That sounds like a pretty big question, so let’s start back at the beginning. It all began with Newton and his Principia.

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  5. simple.wikipedia.org › wiki › Earth_massEarth mass - Simple English Wikipedia, the free encyclopedia

    Newton's law of universal gravitation was the first step to measuring the mass of Earth. Scientists had the idea to hang a pendulum near a mountain. The Earth's gravity would pull the pendulum down, but the mountain's gravity would pull it towards the mountain.

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  7. www.livescience.com › planet-earth › how-much-doesHow much does Earth weigh? | Live Science

    Mar 31, 2024 · By Katherine Irving. published 31 March 2024. Earth's mass took hundreds of years to estimate, and even now, experts don't agree on the exact number. Earth weighs as much as 13 quadrillion...

  8. www.enchantedlearning.com › earth › MassHow was Earth's Mass Determined? - Enchanted Learning

    G was calculated by Henry Cavendish in 1798, and was determined to be 6.67 x 10-11 m3/ (kg sec2). Also needed is Newton’s second law of motion, F=ma, where F is the force applied to an object, m is the mass of the object, and a is its acceleration due to the force.

  9. phys.libretexts.org › Courses › Georgia_State7.2: Mass, Weight and Gravitation Near a Planet's Surface

    As soon as Cavendish determined the value of G in 1798, the mass of Earth could be calculated. (In fact, that was the ultimate purpose of Cavendish’s experiment in the first place.) The value we calculated for g of the Moon is incorrect. The average density of the Moon is actually only 3340 kg/m 3 and g = 1.6 m/s 2 at the surface. Newton ...

  10. www.uu.edu › dept › physicsHow did mankind first determine the mass of the Earth ...

    The first person credited with "weighing" the Earth was Henry Cavendish (1731-1810.) But we must first mention one of the greatest physicists who ever lived - Isaac Newton (1642-1727). Newton’s Law of Universal Gravitation states that any two masses are attracted to one another.

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