The universe started when a singularity of all matter expanded. Superstrings attracted to each other and formed quarks. Quarks coalesced and formed protons. Protons and electrons formed neutrons. Protons, neutrons, and electrons formed hydrogen. Hydrogen clouds gathered and under its gravity formed massive bodies. As the bodies grew to enormous size to internal pressure caused hydrogen nuclei at the core to bounce into other hydrogen increasing temperature tremendously. At high enough pressure and temperature it begins to fuse into deuterium. This releases high energy particles. The galactic body now radiates. As more hydrogen gathers and pressures and temperature increase dramatically hydrogen begins to fuse into helium, which releases a large number of higher energy protons and electrons.

There are now a few things that can happen. The star can continue to gather hydrogen, either from accreting from a companion star, or attracting hydrogen clouds. If this continues the star will reach a point of energy output that exceeds its capacity. If you have ever used a firecracker you should know what happens when energy output exceeds the packaging’s ability to let it out gently. It explodes.

The other option is if the star stops growing, gets old and all the hydrogen fuses into helium. Density goes up, as do temperatures, and again energy output exceeds capacity. Both of these are supernova, and they release an immeasurable amount of energy. We detect gamma radiation bursts as far away as other galaxies from such supernova.

When these occur many things can happen to the core. The outer layer usually forms planets and, more immediately, a nebula. The middle layers and core are pressurized to billions of degrees, which causes fusion beyond helium. This is the formation of metals. Iron is the most common limit to a first generation star. This can become the core of a second generation star, and some can fly outward and form planets, moons, and asteroids. Neutron stars, quark stars, and singularities are also occasionally produced at the core of a large enough supernova.

Second generation stars, formed when the helium and hydrogen again coalesce can go through this same process. When they go nova the iron core can be again heated to billions of degrees, causing heavier metals such as gold, plutonium and uranium, just to name a few. See a periodic table for a full list.

Whenever morality is based on theology, whenever right is made dependent on divine authority, the most immoral, unjust, infamous things can be justified and established.

Google linked me to this page, nice reading

i was wondering where i could find more information about metals in the universe like iron, if u could recommend a another website or book that would be helpful thanks
ritu