Gravity.
An explosion from outside the nebula
Gravity.
NEBULA
Gravity.
Gravity.
An explosion from outside the nebula
An explosion from outside the nebula
Gravity.
NEBULA
nebula's
Gravity.
In the nebula!
A protostar forms when gravity pulls the dust and gases in a nebula together.
pickles
Gravity and heat.
A supernova occurs.