Our Solar System's history started roughly 4.6 billion years ago. A nebula, or slowly revolving cloud of gas and dust, is thought to be the source of the Solar System. The nebula flattened out into a disc shape as it spun, with most of its mass centred in the middle.

When the mass in the disk's centre reached a critical level, the temperature and pressure increased to the point where nuclear fusion could take place. As a result of the energy produced by nuclear events at its core, our Sun was born and started to shine.

The leftover material in the disc started to form planetesimals, which are little objects that orbit the young Sun. Over time, these objects fused and crashed against one another, expanding steadily. They eventually gave rise to the planets, moons, asteroids, and other celestial bodies that comprise the Solar System as we know it today.

Jupiter, the largest planet in our Solar System, was probably the first planet to form. It would have been able to grow quickly because of how much gas and dust its powerful gravity would have drawn in. Saturn, Uranus, and Neptune, the other gas giants, probably formed shortly after.

As a result of their smaller size, rocky composition, and proximity to the Sun, the inner planets, which include Earth, Mars, Venus, and Mercury, are referred to as the terrestrial planets. These planets are thought to have formed from tiny planetesimals that crashed and combined.

The planets' gravitational interactions with one another persisted as they were forming. Some planets were forced to migrate to new orbits as a result of these interactions, while others were completely ejected from the Solar System. The current configuration of the planets in our Solar System is the outcome of these interactions.

The Solar System has changed significantly throughout time. The demise of the dinosaurs was one of several dramatic disturbances brought on by large comet and asteroid strikes. The cosmic environment and the gravitational pull of other stars have also influenced the Solar System.

The fundamental makeup of the Solar System hasn't altered much over the course of billions of years, despite these modifications. The Sun continues to shine today thanks to the energy produced by nuclear fusion in its core, and the planets still revolve around it.

In summary, the Solar System's history is a fascinating one that spans billions of years. The planets, moons, asteroids, and other things that we can currently see were first formed from a cloud of gas and dust that gradually condensed. Although the Solar System has altered significantly throughout time, its fundamental makeup has mostly not changed. We can gain a better understanding of our place in the universe and the forces that have shaped our globe by studying the history of the Solar System.