The cosmos' billions of years of history make up a vast and intricate subject. This is a shortened version:

 The cosmos' billions of years of history make up a vast and intricate subject. This is a shortened version:

13.8 billion years ago saw the Big Bang:

                                                                          ( Big Bang)

  The singularity—a hot, dense, infinitely small point—is where the cosmos started. After that, it began to swiftly expand, signifying the beginning of time and space. The Big Bang, as it is sometimes called, was the catalyst for the creation of everything that exists today.

Cosmic Inflation (10^-36 to 10^-32 seconds after the Big Bang)

                                                                      (Cosmic Inflation)

The cosmos experienced a brief period of tremendous expansion known as cosmic inflation just a fraction of a second after the Big Bang. The early universe's imperfections were smoothed out by this exponential growth, which also created the foundation for the modern structures.

 Matter Formation (seconds to Minutes After the Big Bang)

                                                                   ( Matter Formation )

Protons and neutrons are the result of the combination of basic particles such as quarks and electrons as the cosmos cooled. The temperature began to decline after roughly three minutes, at which point protons and neutrons started combining to create the first atomic nuclei, including hydrogen and helium.

.Between 380,000 and 150 million years after the Big Bang, there were periods of darkness. This was the time when a cloud of hydrogen gas covered the entire cosmos. It was a dark cosmos with no stars or galaxies

Star and galaxy formation (about 150 million years after the Big Bang)

                                                            (Star and galaxy formation)

  The densest gas regions collapsed due to gravity, giving rise to the first stars and galaxies. Over billions of years, these things kept evolving and merging to become the enormous structures that we see in the universe today.

 Planet and Solar System Formation (Following the First Star Generation)

                                                     (Planet and Solar System Formation)

  Stars were frequently encircled by gas and dust disks during their formation. Planets, moons, and other objects orbiting stars were formed by the gradual clumping together of this material over time.

Current Cosmic Expansion:

                                                            (Current Cosmic Expansion)

As the cosmos continues to expand, galaxies are relocating from one another in all directions. Dark energy, a mysterious element that opposes gravity on a cosmological scale, is the driving factor behind this expansion.

This is a very simplified overview of the universe's history. These are the major occurrences that have shaped the universe as we know it; there are many more specifics and the details involved.