Saturday, March 12, 2022

Physics/Precious Metals & Russia ...

 These are crystals of pure gold metal, a well-known precious metal.

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. :)

What Makes a Metal Precious?

Precious metals are elemental metals that have high economic value. In some cases, the metals have been used as currency. In other cases, the metal is precious because it is valued for other uses and is rare.

How PMs are made ...

The 2017 neutron star merger that confirmed Schramm’s idea convinced many astronomers that these events, once considered exotic and far-fetched, made nearly all of the gold, platinum, and other r-process elements in the universe. Ji, now at the Carnegie Observatories in Pasadena, CA, says he too thought that neutron star mergers were the answer, and he still leans that way, but he and others are also considering alternate theories. “I think most astronomers outside the field said, ‘Oh, great. This looks like the thing is all solved. Now it’s neutron star mergers,’” says John Cowan at the University of Oklahoma in Norman. “But I think the people working in the field realize there’s still some complications to solve” (9).

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


Why all of this background data, well ... guess who has most of this stuff?






It gets better ...









It's all about the money.

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