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How was Uranus' (planet) density measured?

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There is a very readable Scientific American explanation that is too long to copy-and-paste here. The link is How do scientists measure or calculate the weight of a planet? IT's actually fairly straightforward with a few handy equations. read more

Compared to the largest planet in the solar system, Jupiter, Uranus is a mere 1/20 of its mass. The density of Uranus is 1.27 grams/cubic centimeter. That’s 1 ¼ times denser than water. Density is measured by dividing the amount of mass in a substance by the volume of a substance. read more

IT’s actually fairly straightforward with a few handy equations. This page may be out of date. read more

Earth has the highest density of any planet in the Solar System, at 5.514 g/cm 3. This is considered the standard by which other planet’s densities are measured. In addition, the combination of Earth’s size, mass and density also results in a surface gravity of 9.8 m/s². read more

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