Answer:
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.
Credits to: NASA
My Answer to it:
If we want to know how our solar system began, we would first look at how it all started, as in the universes and matter. This is tied into the Big Bang Theory, which is proposed by scientists the explains causes to why the universe formed. In the theory, it states that all of the current and past matter in the universe came into existence at the same time, roughly 13.8 billion years ago. At this time, all matter was compacted into a very small ball with infinite density and intense heat called a Singularity. As time went on, it started to expand and started to cool off to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity to form stars and galaxies.