Sol System

The Sol System consists of a single star, eight planets, numerous dwarf planets, and a countless number of asteroids and comets. Below is a list of the major locations in the Sol System and what type of celestial body they are, a Net link is also included for more information if that is desired.

1. Mercury: A terrestrial planet orbiting quite close to Sol. There is very little human activity on or around Mercury because the problems of cooling a spacecraft that close to Sol. There is talk of mining the surface or beginning the construction of a Dyson Sphere from its surface, but it is highly unlikely that either of these project come to fruition any time soon. Net Source for Mercury: https://solarsystem.nasa.gov/planets/mercury/overview/
2. Venus: A terrestrial planet with a significant atmosphere of carbon dioxide. Some human activity around Venus, however the habitability of the planet is limited to the upper layers of the atmosphere. Net Source for Venus: https://solarsystem.nasa.gov/planets/venus/overview/
3. Terra: The largest terrestrial planet in the Sol System, and the only known planet where life has formed. Once known as Earth, Terra is also the home planet of humanity and therefore the most human activity takes place on or around it. Net Source for Terra: https://solarsystem.nasa.gov/planets/earth/overview/
• Luna: Also known as Terra I, Luna is Terra's only moon. Luna is a hotbed of human activity as it was the first celestial body colonized, besides Terra of course. Luna is large for a moon and because of such, plays a significant role in stabilizing Terra's climate. Net Source for Luna: https://solarsystem.nasa.gov/moons/earths-moon/overview/
4. Mars: The last terrestrial planet in the Sol System, Mars is home to the second largest human population in the entire system. Once a completely lifeless rusty desert, Mars is now a rusty desert dotted with enclosed human cities. There are a few genetically modified plants and bacteria that have been introduced into the Martian environment in an attempt to begin terraforming the planet however. Net Source for Mars: https://solarsystem.nasa.gov/planets/mars/overview/
5. Ceres: Although not an actual planet, Ceres is a major dwarf planet located in the asteroid belt between Mars and Jupiter. Ceres is the center of activity in the Belt as it is orbited by Ceres Station, the largest habitable station built by humanity, and the location available for Belter vessels to resupply. Net source for Ceres: https://solarsystem.nasa.gov/planets/dwarf-planets/ceres/overview/
6. Jupiter: The first of the gas giants in the Sol System, Jupiter also happens to be the largest planet in the system. There is a notable human presence around Jupiter, also referred to as the Jovian system, as it is the newest location to fall under the increasingly large colonization effort. The fuel gases mined from its atmosphere is another reason for the substantial amount of human facilities around Jupiter. Net Source for Jupiter: https://solarsystem.nasa.gov/planets/jupiter/overview/
• Io (Jupiter I): The closest of Jupiter's four largest moons, Io is an extremely interesting world with its many active volcanoes. However, there are no human settlements on or around it as Jupiter's massive radiation belts would be hazardous to most life. Net Source for Io: https://solarsystem.nasa.gov/moons/jupiter-moons/io/overview/
• Europa (Jupiter II): The second of the four Jovian moons known as the Galilean moons, Europa is the most likely place within the Sol System for life to form besides Terra. Regrettably, the radiation belts around Jupiter make exploration of the moon dangerous and expensive. Despite the dangers, there have been a few missions to the surface, but no mission has yet made it through the thick ice crust surrounding the hypothetical ocean beneath. Net Source for Europa: https://solarsystem.nasa.gov/moons/jupiter-moons/io/overview/
• Ganymede (Jupiter III): Ganymede is the largest moon in the entire Sol System, even larger than the planet Mercury, although not quite as dense. Ganymede likely has a subsurface ocean like Europa, however no missions have yet to prove this theory and the moon remains uninhabited due to the high radiation levels. Net Source for Ganymede: https://solarsystem.nasa.gov/moons/jupiter-moons/ganymede/overview/
• Callisto (Jupiter IV): Callisto is the furthest out of the Galilean moons and the only permanently inhabited celestial body in the Jovian system. In fact, the capital of the fledgling protectorate, named Frontier, is located on the surface of Callisto. The colonization of Callisto is made possible because of it's distance from Jupiter, it is outside of the deadly radiation belts that make the other 3 Galilean moons unsuitable for Terra life. Net Source for Callisto: https://solarsystem.nasa.gov/moons/jupiter-moons/callisto/overview/
7. Saturn: The 2nd gas giant in the Sol System, Saturn is known for its impressive ring system around the planet's equator. Saturn's moon, Titan, is the second largest moon in the Sol System behind Ganymede. There is a steady human presence around Saturn as the United Federation of Scientists calls the Saturn system home. However when compared to other bodies in the Sol System, the population of the Saturn system is quite small. Net Source for Saturn: https://solarsystem.nasa.gov/planets/saturn/overview/
8. Uranus: Uranus is the first and largest of the ice giants within the Sol System. Instantly recognizable due to its significant tilt from the ecliptic. Uranus appears to have, in essence, tipped on its side. It also has a small ring system, though nowhere near the size of Saturn's. There is no human presence around Uranus. Net Source for Uranus: https://solarsystem.nasa.gov/planets/uranus/overview/
9. Neptune: The second of the two ice giants, Neptune is the last planet in the Sol System. Despite being extremely cold, Neptune boasts the fastest winds in the entire Sol System. There is no human activity around Neptune, though there have been discussions about a manned mission to Triton, Neptune's largest moon. Net Source for Neptune: https://solarsystem.nasa.gov/planets/neptune/overview/