The correct answer is D) all of the above.
Much of what we know about our solar system is based on observations of younger and nearby star systems, planets, planetary objects and computer simulations, and models.
Duo to all of those research activities, scientists have taught us that our solar system has one bright and hot star in the center of the system called the Sun, eight planets that orbit around the Sun, and there are also other spheres called dwarf planets, and many comets, and asteroids. Most of the planets have many moons. Our Solar System is located in the center of the Milky Way Galaxy.