Rotation causes the cocoon of dust to flatten into a dusty disk around protostars.

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This is known as a protoplanetary disk, where the dust and gas eventually clump together to form planets. This is a known process in the formation of protostellar systems, called the protoplanetary disk. The rotation of the dust and gas cloud around the young protostar causes it to flatten into a disk, where planets can eventually form.

Rotation Causes the Cocoon of Dust to Flatten into a Dusty