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Q&A

Two new planets orbiting the Sun beyond Pluto

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What would happen if there was two more planets beyond Pluto, one with two times the size of Pluto and another with 4× the size of Mars, I'm curious to know what effects this would have on the planet close to the Sun, such as planets around the same position of the Earth, and what would happen to man kind?

And is there a maximum size a planet could be before it would start to affect the Sun?

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This post was sourced from https://worldbuilding.stackexchange.com/q/25215. It is licensed under CC BY-SA 3.0.

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