Re:The periodic table, colour coded by the likely origin of ...
by AllegedAlec on Tuesday August 11, 2020 @09:19AM
(#24119974)
Our sun is about 4.6B year old. There were a few other generations of stars that lived and died before our sun came about, and these spewed out the heavier elements that make up our solar system.
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Re:The periodic table, colour coded by the likely origin of ...
by Tepix on Tuesday August 11, 2020 @11:38AM
(#24121496)
It must have been a somewhat dull first generation of stars and planets with only Hydrogen and Helium around.
On the other hand, giant stars explode after just a few million years so it didn't take long for other elements to appear.
Re:The periodic table, colour coded by the likely origin of ...
by dredmorbius on Tuesday August 11, 2020 @02:14PM
(#24123684)
The ratio of heavier elements to H & He is called metallicity, and it is a measurable characteristic of stars, which are classed into Type I (high metallicity) and Type II (low) populations. Low-metallicity Type II stars are generally older.
Nothing specific on what Type II stellar systems and planets would be like, though I'd suspect gas giants, generally.