The star in the center of the system is called Multu. Multu is a yellow dwarf like the one in the Solar System.
The planet closest to Multu is called Uebos. Temperatures can reach up a an astonishing 482ｰC on the side facing towards the star. There is no atmosphere and there is very little gravity. There is very little seismic activity present. Craters on the surface suggest that it was struck by meteorites. Because the surface can absorb so much heat, the temperature doesn稚 really change at all during the night.
Inner Multu Asteroid Belt
Separating Uebos from Ferox-1a the Multu Super Asteroid Belt. It痴 width is roughly 3,240,000 miles thick, or 5,214,274km at all points. Asteroids can range from the size a school bus to a small planet. The asteroids within the belt are mostly C-type asteroids also known as chondrite asteroids. They are primarily composed of clay and silicate rocks and are dark in appearance.
The second planet from Multu is called Ferox-1a. It痴 named after the Latin word for wild. Most notable for it痴 failed attempt to be terraformed, it created super resilient, mutant vegetation. The distance between Multu and Ferox is very immense. Temperatures range from 20ｰC during the day and 17ｰC during the night. There is a breathable atmosphere present and the gravity is slightly greater then that of earth's. Buildings were abandoned because of what presumably was the accident involving the terraforming. Small, ruined settlements from what looks like and advanced space faring civilization can be found across the surface of the planet. There is minor seismic activity and a couple of active volcanoes can be found. The planet is very rich in lithium and iron.
Oceanum-22a is appropriately named after it痴 most notable feature, a world-wide ocean. It retains a breathable atmosphere and possesses slightly less gravity then the earth. Life is abundant under the ocean with diverse underwater landscape. The deepest point is 35,814ft (roughly 10,916m) below sea level. Seismic activity is very high and underwater volcanos and smokers are prevalent. Above the water, the temperature ranges from 18ｰC during the day and 13ｰC at night. Underwater, the temperature is routinely stays at 22ｰC. Underground tunnels and extensive caves can be found as well as volcanic ravines between some active plate boundaries. Small, alien life has a tendency to stay around raised areas of underwater land created by volcanic activity. In drop off, there tends to be leviathan class life forms which is why many of the smaller organisms tend to stay in more shallow regions. The water cannot be consumed due to its salinity. The planet痴 most abundant resources that can be found are sodium, copper, lead, iron, and uranium.
The 4th planet from Multu is called Metalium-4a. The planet is named after it being a alien battle sphere and being made out of metal. Its brown color comes from the rusting metal of the battle sphere. About 85% of the battle sphere痴 sophisticated weapons are not in working order and 70% of that is beyond repair. A breathable atmosphere is present on the planet, and its gravity is very similar to that of the earth. Inside, is a vast network of tunnels and transport systems and hundreds of trillions of miles of wiring. The side facing towards the sun is hotter then usual, around 29ｰC due to metals a utility to absorb heat. And the dark side is rather cold and usually is around 11ｰC. As we go deeper inside, we can find rusted, still functioning robots which are still hostile to trespassers. Even deeper, we discover what looks like a geothermal plant that utilizes the heat from within the planet. We can find what seems to be a giant, flooded rooms with what looks like a water holding tank. The extraterrestrial species that constructed this seemed to be very militant. It is possible they were defending a very strategic advantage point. But the fact that very little items were left behind suggests that there must have been an intergalactic peace treaty that was ratified. Then the unknown species, not needing this battle sphere any more, abandoned it. But that may not be the case and we may never know for sure.
The 5th planet from Multu is called Gelidus-17a; which means chill in Latin. Also, notice it's single ring of debris which is comprised of many M-type asteroids from the nearby belt. The atmosphere is barely breathable and is not recommended to stay extended periods of time outside. The gravity is very similar in compared to the earths gravity. Temperatures on the surface of the planet can range from 12ｰC to -10ｰC. The low amounts of gravity allow for big, needle leaf vegetation to grow an astonishing 9ft. Fauna is rather sparse. The creatures that inhabit the planet have thick, wool-like coats to protect them from the cold. All drinking water is locked in icecaps and frozen lakes. There is little to no seismic activity. Geldius also possesses two natural satellites. One of which is a humongous, metallic asteroid. And the other, a small sphere that has a soil similar to that of the earths moon, but it痴 black.
Orbiting Gelidus-17a, is one of its moons designated Gelidus-17b or Luna, ironic because of how much light is reflected off of it. The soil on Luna is very similar to dust present on the earth's moon. The only difference, a higher amount of carbon present in the soil resulting in it being black. The moon does not retain an atmosphere, and the gravity is highly similar to the earth's moon. The moon has resources such as aluminum, tin, iron, and nickel.
Orbiting Gelidus-17a is another natural satellite designated Gelidus-17c. Gelidus-17c is a massive M-type asteroid, it is roughly 70ft wide and 500ft in diameter (≈21m and ≈152m). It's primarily composed of iron, nickel and some silicates.
Outer Multu Asteroid Belt
The Multu Outer Asteroid Belt is completely made of M-Type asteroids. Asteroids in this belt can be as big as a tricycle to a school bus. Its width is roughly 1,320,000 miles thick, or 2,124,334km at all points. The asteroids in the belt are composed of iron, nickel, and a slight amount of cobalt and silicates.
Tempestas-182a is a gas giant named after it's stormy look. If you look closely, you can see a light blue swirl amongst the dark cyan. That's a great, big storm with winds up to 270mph. The atmosphere is easily not breathable and the gravity is 1.65x greater then that of the earth's meaning you'll be crushed. The the atmosphere is composed of methane (which gives it it's blue color), hydrogen and helium.
The last planet in the Multu System is designated Pulchra-61a, which means beautiful in Latin. The planet is composed of many of the same gasses as Jupiter and they include hydrogen and helium with a little bit of ammonia. Gravity on Pulchra is 2.31x greater then that of the earth, which will mean you are super crushed. There are two separate storms each in the other hemisphere. Wind speeds within these storms can reach up to 345mph.
I made all these planets from scratch using different programs. Excluding the asteroids. Also multiple nations can inhabit a planet.
Third Soviet Union