I'm going to be telling you how the universe was created. I'm not going to talk about how the universe came into existence rather how it evolved since its existence so since the Big Bang. We're gonna have a timeline, and we're gonna move in the criminological order to see how space and matter evolved since the Big Bang. To make it easier for you guys I divided the evolution of the universe into seven main parts.
We're gonna start at the Big Bang but unfortunately, astronomers aren't yet 100% sure of how exactly the universe started. We're gonna start at around 10^-36 seconds after the Big Bang. Most people think the Big Bang wasn't that much of a bang it wasn't an explosion it was rather the sudden appearance of the fabric of space and its expansion in 2001 NASA launched the WMAP mission which had a goal to calculate the age of the universe. They did that by measuring the radiation coming from the Cosmic Microwave Background they then determined that the age of the universe was 13.8 billion years old.
An incredible expansion
Now right after the Big Bang so the appearance of space everywhere in the universe. The universe underwent an incredible expansion in which in a very small amount of time it doubled in size at least 90 times and as it got bigger. It also got cooler and less dense so the universe kept expanding but it expanded. At a slower rate within three minutes neutrons and protons collided to make deuterium which itself climate to make hydrogen, more and more protons, and neutrons collided, and more and more hydrogen was created. However, for the first 380,000 years after the Big Bang, the universe was still too hot for light to shine.
Let there be light
After 380,000 years the universe had expanded and cooled down enough for electrons to combine with nuclei and form neutral atoms. As we know them today so this phenomenon of electrons combining with nuclei released radiation which is still detectable from the Cosmic Microwave Background but this age was still rather dark as there weren't any stars yet.
The age of reorganization
About 400 million years after the Big Bang the universe entered the age of realization. This dynamic phase lasted more than half a billion years during this phase comes gas collapse due to gravity and that caused the first stars and galaxies to form. This phenomenon emitted ultraviolet light that radiations from the early universe.
The birth of our solar system
Galactic and stellar evolution so more and more stars and galaxies are getting created with time. In one of those galaxies, our solar system was created our solar system was estimated to have both increases in 19 billion years. After the Big Bang so it has an age of about 4.8 billion years. Now our solar system like many others was created from an interstellar cloud of dust and gas this cloud collapsed into itself due to gravity creating a solar nebula.
Now in that solar nebula which is a spinning disk of material gravity kept pushing the battery to the center of the solar nebula and in that center pressure increased more and more until the pressure was high enough for hydrogen atoms to collide into themselves creating helium in a process known as nuclear fusion.
Nuclear fusion comes stars and that' show our Sun was created it now accounts for 99% of the whole solar system's nuts but there was still a matter. In that spinning disk, some of that matter combine to make planets some other combined to make moons some other leftover rocks were combined to make the asteroid belt there was finally some leftover matter in the form of meteoroids comments and that gives us the solar system that we live in today that consists of our store the Sun and everything bound to it by gravity the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune dwarf planets such as Pluto dozens of moons and millions of asteroids comets and meteoroids.
Our universe today
Which is one of 30 galaxies in the local cluster.
Which is one of the hundreds of turds in the Virgo supercluster which is one of 10 million superclusters in the observable universe
The accelerating universe
That's not all in the mid-1920s astronomer Edwin Hubble observed distant galaxies and meet the ground-breaking discovery that - our universe is expanding not only that but the expansion is actually accelerating astronomers explained the accelerating rate of the expansion of the universe with something called dark energy. Today is estimated to account for 68% of the universe another 27% is for dark matter and only 5% of the universe is made up of regular matter, which we can observe.
The cosmos is still a great mystery as we only know 5%, I'm here to tell you to stay courteous so to conclude the universe started at the Big Bang right after that it underwent a very very brief yes very important period of expansion known as inflation. This also allowed the universe to become less and less dense and cooler and cooler now that led to neutrons colliding with protons to form deuterium which itself collided with itself to form hydrogen and then eventually, electrons could collide with nuclei to form neutral atoms as we know them today around 400 million years after the Big Bang the universe entered the age of realization that age lasts a really long time and it was at that time that stars and galaxies started forming our solar system formed around 4.8 billion years ago and evolved for us to live in it today.