So n high mass stars, after the red giant phase, there is still a hell of a helium to burn. So, this helium slowly fuses to carbon, carbon to something and on and on and on untill (!) you reach Iron. Because iron is very hard to fuse. So here the core, gets done. Now, as there is no radiation pushing outwards. This core (only the coree, not the star) collapses itself into itself. Because there was just gravity pulling it. Creating shock waves with such high energy that they fore iron to fuse into platinum/silver/gold. Some supernova threw gold to our earth.
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Dark matter, theory of relativity, dark energy, negative mass, end of the universe, The Big Bang, 'What is beyond the universe?' etc. If you love such things, Welcome to your home.'
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