SOLAR SYSTEM

Detailed explanation-1: -In order from smallest to largest, some important terms to remember are: planets and stars, solar systems, galaxies, the universe. Each term is a component of the next. (Aside from planets and stars which are both different components of solar systems.)

Detailed explanation-2: -The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and then the possible Planet Nine.

Detailed explanation-3: -What is bigger than the universe? The Universe is the biggest when compared to a galaxy or the Solar System.

Detailed explanation-4: -The solar system has a diameter more than 40 times greater than the distance to the sun, but the solar system is a tiny part of much larger galaxy. Our galaxy (Milky Way) is only one of billions of other galaxies in the universe.