Count the planets in the solar system and make an assessment of their various sizes and distances from Sol and the Earth as you leave on your journey to the beginning of the universe. You'll find that the line between planet and smaller planetoids, like asteroids and meteorites, has yet to be firmly set in place in the astronomy books, and in the universe.
 
We were all taught during our school indoctrination of nine planets circling Sol at varying distances. Mercury and Venus lie clos...