“Want to know what is Universe”.
The Universe is all of space and time and its contents, which includes planets, moons, stars, galaxies, the contents of intergalactic space and all matter and energy. We live in milky way galaxy and solar system is part of it even 95% of universe is dark. Our nearest galaxy is Alpha centauri. Alpha Centauri is the closest star system to the Solar System, being 4.37 light-years from the Sun. It consists of three stars: Alpha Centauri A and Alpha Centauri B, which form the binary star Alpha.
We know very little about universe might be there are too many earth, may be there are so many solar systems, there are too many questions this mystery about universe wile be solved one day because we humans are so intelligent that we can solve any mystery we want.