Question: how was nature made and how did the milky way created

Lucien Heurtier answered on 20 Mar 2023:

All the stars, planets, and black holes come from the matter which was floating around in the cosmos. Initially, this was just very simple forms of matter, just electrons, protons, and maybe the lightest atoms like hydrogen (an electron and a proton together). But with time, the universe expanding, these things start being isolated, and each time they meet with one another, they stay attracted together and for bigger and bigger clouds of particles.

By putting two atoms together, you can either form a molecule or form heavier atoms. That’s how stars form: clouds of gas start forming clumps of gas which get more and more dense as they contract. Then the pressure becomes larger and larger in the little cloud, and atoms meet each other. That’s when nuclear reactions start, because all the atoms hit each other, and the more you wait the more the cloud is contracting (because of gravitation) and these collisions happen more and more often. The star starts shining!

Stars are so dense that they can force very heavy atom to form. Sometimes the become so dense that they collapse, and either explode into a supernovae or end up into a black hole. When a supernovae explodes, it ejects all these heavy atoms it had formed, that go everywhere around it into the universe. All these atoms can then collide into little pieces of matter, and then eventually gather to form a planet… it’s a very long process that takes millions of years!

The Milky way is just the result of what I just described: start with a big amount of gas, let it collapse into many stars, let them explode, form planets, and then you obtain a big bunch of stars turning around each other: that’s our galaxy, the Milky Way!