Are Most Star Systems Composed Mainly of Light Elements?

[David Fosco]

TL;DR

Looking for a root question of life on other planets.

If we were made from a Supernova (all our heavy elements) does that mean most star systems are made up of just a few of the first elements encluding planets?
Thanks for your time.

 

[anorlunda]

There's a very germane article on Wikipedia. Short answer, supernovas are not the only source.

https://en.wikipedia.org/wiki/Nucleosynthesis

Edit: see also
https://en.wikipedia.org/wiki/Metallicity

 

[Keith_McClary]

Supernovas blasted heavy elements all over the galaxy. They were incorporated into the Sun (and planets) at the time of their formation.
https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elements#Universe
Our elements may have been through several "generations" of supernovas.
There are some ancient early generation stars (not big enough to supernova) that are low in heavy elements.

 

[phinds]

If we were made from a Supernova (all our heavy elements)...

We're not. Neutron star collisions are also major contributors

https://www.sciencemag.org/news/201...-elements-are-created-neutron-star-collisions