What catastrophic event is the prevailing consensus for triggering the solar nebula's collapse?

Answer

A nearby supernova explosion

The transition of the stable, cold solar nebula into a collapsing state required an immense external energy input, a cosmic jolt powerful enough to overcome the inherent stability of the massive gas cloud. The scientific consensus points to the death throes of a massive neighboring star, specifically a supernova explosion, as the most probable catalyst. This catastrophic event releases an extraordinarily powerful shockwave. When this high-energy wave impacted the relatively calm nebula, the resulting compression provided the necessary density increase to overcome the cloud's internal resistance, tipping localized regions toward gravitational instability and initiating the system's eventual formation.

What catastrophic event is the prevailing consensus for triggering the solar nebula's collapse?

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