Why do flat disks form around young stars?
A)They don't; the stars form from the disks.
B)Centrifugal force pushes gas outward from the spinning gas cloud.
C)Intense winds from nearby massive stars flatten the gas cloud.
D)Collisions between rotating gas particles flatten the gas cloud along the axis of rotation.

Question

Quizplus · Accepted Answer

Collisions between rotating gas particles cause the gas cloud to flatten into a disk shape along the axis of rotation due to conservation of angular momentum.

Why Do Flat Disks Form Around Young Stars