Center of mass on physical things interests me. From sitting on teeter-totters to level them out to building tall towers liable to fall at any minute with my granddaughter, it's fun to see how to balance things like these, especially with a laughing four-year-old.
It's fair to say planets orbit the Sun, but that's not 100% true. The Sun holds 99.8% of the Solar System's mass, Jupiter contains most of what's left (Saturn a distant 2nd), and in this vid you'll see how Jupiter plays tug of war with the Sun. Everything orbits a center of mass!
Enjoy.
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