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Doc & JPAre planets and stars the ultimate particles?
And does the decay of stars through fusion seed the Universe with all of the smaller particles?
Do collisions of Massive particles like meteors and comets, cause explosions, and huge collisions of meteors and comets cause the debris we see on differing trajectories fly in the face of a unified expansion of the Universe?
When you get down far enough, the most fundamental things you can find are the elementary particles of the standard model, which are what DoctorBeaver was asking about I believe.
Yeah - it seems that a photon energetic enough to probe a Planck sized object could spontaneously create a Planck sized particle that would have sufficient mass to become a BH. However, would not a Planck-sized BH also be the smallest BH that could be created? If so, it should evaporate very quickly.
A possible factor in the very early stages of the BB is that so many interactions were going on at any one instant that contradictory interactions may have been occuring simultaneously i.e. while an interaction might have been creating a particle, another simultaneous interaction may have been destroying it, whilst yet another might have been trying to create an entirely different particle. For particles to be successfully created the interactions must be allowed exclusivity and sufficient time to complete, but with a high enough energy density and too little time it's possible that that couldn't happen.