What astrophysical event is cited as a potential external trigger providing initial shock compression to a molecular cloud?
Answer
Supernova Shock Waves
While massive, cold clouds possess the intrinsic instability necessary for collapse, the initial tipping point is frequently assisted by external compressive forces that rapidly boost local density. One of the most powerful external stimuli mentioned is the blast wave generated by a nearby star that has exploded violently, known as Supernova Shock Waves. This passing shock front compresses the material suddenly, tipping the local balance decisively toward gravity before the gas particles have time to generate significant counteracting thermal pressure. Furthermore, the text notes that the material forming our Solar System may have originated from such a supernova event.
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