Gold: Alchemist-hp (talk) www.pse-mendelejew.de/Wikimedia Commons/CC-SA-3.0
We are made of stars, precious metals are made when stars exhaust their primary fuels of hydrogen and helium and move toward heavier elements. like iron. to burn before collapsing, thus producing neutron stars, one byproduct of supernova explosions of entities far larger then the sun. (think black holes) When neutron stars merge, precious metals like gold, silver, platinum and palladium are generated but ... as stated before ... it's complicated. :)
How PMs are made ...
In fact, supernova explosions are a necessary part of the solution, says Chiaki Kobayashi at the University of Hertfordshire in England. Neutron star mergers “are not enough” to explain all the r-process material in the universe, Kobayashi says. She and her colleagues recently set out to understand the origin of every element from carbon to uranium. They calculated how stars with different lifetimes endow the galaxy with different elements, then compared the observed compositions of stars from young to old. For example, short-lived high-mass stars make lots of oxygen, so this element appeared early in the Milky Way’s history, whereas iron took longer to form, because most of that element comes from the explosions of long-lived stars. By comparing their models of the galaxy’s chemical evolution with actual observations of europium and other r-process elements in stars of different ages, Kobayashi’s team concluded that neutron star mergers made only a fraction of the universe’s r-process material; some rare type of supernova made the rest (10).
Palladium: Jurii/Wikimedia Commons/CC-3.0
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