Constellations of co-orbital planets

It’s time to revisit one of my favorite topics: co-orbital planetary systems, in which more than one planet share the same orbit around a star. (Side note: co-orbital systems can exist on different size scales — many stars can share an orbit around a black hole, or many moons share an orbit around a planet, … More Constellations of co-orbital planets

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Billion-year evolution of the Solar System: climate forcing and orbital chaos

TL;DR: The planets’ orbital shapes, tilts and spins oscillate due to the gravity of the other planets — this has a strong effect on Earth’s climate. On billion-year timescales the terrestrial planets’ orbits are chaotic and cannot be predicted precisely. … More Billion-year evolution of the Solar System: climate forcing and orbital chaos