Can a Large Planet Orbit a Smaller Planet?

Let me clarify on the title, because this is important. In recent years, people have been feeling less comfortable calling the only natural satellite orbiting Earth a moon. It may not be the largest satellite in the solar system, but in proportion to its mother planet, it takes top billing. In fact, there's been talk that we should start calling Earth and moon "a binary planet".

Also in relation to this question is iron. This metal makes up 84% of the Earth's core, and it's known to have magnetic properties. There is recent evidence saying that the moon also has iron in its core, but its smaller size means that it orbits the blue planet, not the other way around.

But if our recent exploration into the universe is any indication, there are some things in the cosmos that defy explanation and conventional understanding. So is it possible for a large planet the size of Earth with a core that is 84% iron to orbit a smaller planetary body the size of Ganymede with a core that is 100% iron from a distance of, say, 426,000 miles?

posted over 6 years ago

JohnWDailey‭

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