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It turned out that the formation of the planet under certain circumstances begins with the creation of a dust disc. It twists, because of which the matter begins to accumulate on the disc unevenly – less at the edge and more in the centre, near the axis of rotation. And then the poles. Thus, for some time the planet “blank” looks like a thick pancake, then begins to resemble a yule. The mass of matter in the centre grows and it becomes rounded, takes a close to spherical shape. However, this is just a hypothesis, we have yet to find such a flat planet.