There's no design, it's complete randomness as to how the system forms after the initial process that triggers it. Even if you don't believe scientific theory or the nebular hypothesis, the search for exoplanets has shown that there are a variety of planetary designs and solar system formations.
Just looking at our closest neighbouring system will tell it's own story - Alpha Centauri is a binary star system. It has an exoplanet roughly the same mass as the Earth, but it is so close to Alpha Centauri B it is most probably covered in magma. The system has no planets the size of Neptune or greater, so is not like our Solar System.
Just looking at our closest neighbouring system will tell it's own story - Alpha Centauri is a binary star system. It has an exoplanet roughly the same mass as the Earth, but it is so close to Alpha Centauri B it is most probably covered in magma. The system has no planets the size of Neptune or greater, so is not like our Solar System.
