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A spherical (or indeed random) shaped cloud with an initial angular velocity will always collapse to a disc. Gravity tries to collapse the cloud to a point, but the angular momentum must be preserved. So gravity builds the star, but the angular momentum prevents some material falling into the star, forming a disc where the centripetal force from the angular momentum of the material matches the gravitation field strength. So the disc always forms perpendicular to the axis of the initial spin.
Al.
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