Dying low-mass stars, like our Sun, don't actually create very heavy elements. Instead, they produce elements up to iron (Fe) through the process of nuclear fusion.

Here's why:

* Fusion requires energy: Each step in the fusion process requires energy to overcome the electrostatic repulsion between positively charged nuclei.

* Iron is the most stable element: Iron has the highest binding energy per nucleon, meaning it's the most stable element in the universe.

* Fusion beyond iron consumes energy: Fusing elements beyond iron *consumes* energy instead of releasing it. This means the process can't continue within a star's core.

So, how do we get heavier elements?

Heavier elements are created in supernova explosions, which are the deaths of much more massive stars. When a massive star runs out of fuel, it collapses under its own gravity, triggering a cataclysmic explosion.

During this explosion:

1. Neutron capture: The extreme conditions of a supernova create a flux of neutrons, which bombard existing nuclei. This process, called neutron capture, allows the creation of heavier elements.

2. Rapid neutron capture (r-process): The rapid addition of neutrons during a supernova explosion leads to the formation of very heavy elements.

In summary:

* Low-mass stars like our Sun produce elements up to iron through fusion.

* Heavy elements beyond iron are primarily created in the explosive death of massive stars (supernovae) through neutron capture.