How to Figure Out the Mass of the Earth—With Balls and String
To revist this article, visit My Profile, then View saved stories. Its fun to think about how we know stuff. For instance, the sun has a mass of about 2 x 10 30 kilograms. That is such an enormous mass that its difficult to comprehend. And if its so difficult for us to even imagine numbers that large, how would we go about finding those values? Well, the original method was to use some small masses, a stick, and a string. Yes, this is one of the important steps in determining masses of both th...
Source: wired.com