The big bang involved a ton of energy. The exact process that formed the matter in our universe is unclear, since every process we know of should also form just as much antimatter.
However, it would appear that as the universe cooled it was almost exclusively hydrogen. As gravity pulled this hydrogen together, stars formed, fusing the hydrogen to make heavier elements up to roughly where iron is on the periodic table.
Anything heavier than that requires huge amounts of energy. Most likely supernovae or neutron star collisions.
The big bang involved a ton of energy. The exact process that formed the matter in our universe is unclear, since every process we know of should also form just as much antimatter.
However, it would appear that as the universe cooled it was almost exclusively hydrogen. As gravity pulled this hydrogen together, stars formed, fusing the hydrogen to make heavier elements up to roughly where iron is on the periodic table.
Anything heavier than that requires huge amounts of energy. Most likely supernovae or neutron star collisions.
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