The Terran Solar system is a planetary star system. It is a group of 8 planets orbiting a yellow, middle aged (approx. 5 billion), type G star. This star is called is often referred to as Sol or "The Sun" by the system's inhabitants. The four outermost planets Jupiter, Saturn, Neptune, and Uranus are cold gas giants. Jupiter is the largest, it is a "failed star" and Saturn is known for it beautiful set of rings.
The four inner planets: Mercury, Venus, Earth, and Mars are terrestrial (mostly solid). The third planet is Earth, it is home many of life forms; because the system hosts an inhabited world it is named first for that planet with life and then for the star it orbits.
Bob: Hey Ted lets fly the saucer by Earth on the way home?
Ted: Earth? Where is that?
Bob: It's in the TSS, I heard that some of the humans there are pretty hot.
Ted: Nah, I gotta pee and none of the bathrooms there are clean. Lets just go home to the Vegan Star System
Bob: Yeah okay, I'm not into the bar scene anyway.