What flattened structure results from the interplay of gravity and increasing rotation during collapse?

Answer

Protoplanetary disk

The resistance of centrifugal force along the plane of rotation causes material to pile up there, flattening the structure from a roughly spherical cloud into a thin, rotating, pancake-like structure known as a protoplanetary disk or solar nebula.

What flattened structure results from the interplay of gravity and increasing rotation during collapse?
astronomygravitynebulastar formation