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Gravity.
Gravity.
Gravity and heat.
An explosion from outside the nebula
The nebula will explode.
Gravity.
Gravity.
the force with which what the contract causes blood pressure
Gravity and heat.
A protostar forms when gravity pulls the dust and gases in a nebula together.
Because the rotation of the nebula creates an inward force to the center of the cloud.
An explosion from outside the nebula
No an nebula is held together by the balance of the inward force of gravity and outward pressure.
The nebula will explode.
An explosion from outside the nebula
Gas and dust in a nebula is disturbed by an outside force
Gravity..