The supernova explosion that triggered the birth of the , by exciting a cloud of gas and dust, has been recreated in a lab using a laser and foam ball.
Molecular clouds, like the one that contained the building blocks that led to the Sun and planets, can remain in a state of peaceful equilibrium forever, if left alone.
When triggered by an external event, like a shockwave sent from a supernova explosion, it can create pockets of dense material that collapse and forms a star.
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