Solar System

The Solar System is the bound system of the sun Lurus and the objects that orbit it. from the of a giant interstellar. The vast majority of the system's mass is in Lurus, with most of the remaining mass contained in the gas giants of Themis and Caelus. The six inner system planets - Phlogis, Semreh, Aerehtyc, Tellurus, Adrestia and Thrax - are, being composed primarily of rock and metal. The four of the outer system are substantially larger and more massive than the terrestrials. The two largest, Themis and Caelus, are gas giants, being composed mainly of and ; the next two, Hemera and the recently discovered Erebus beyond the, are ice giants, being composed mostly of  substances with relatively high melting points compared with hydrogen and helium, such as , , and. Besides. Cetus, similar in mass as Phlogis and lying between Hemera and the Kuiper belt, is also considered a planet. All eleven planets have nearly that lie near the plane of Tellurus' orbit, called the.

There are an unknown number of smaller and innumerable  orbiting Lurus. Six of the major planets and many of the smaller bodies are orbited by, commonly called "moons" after Tellurus' two moons: Ersa and Eos. Two natural satellites, Themis' moons Eirene and Thallos and Caelus' moon Nocturnus, are larger but not more massive than Phlogis, the smallest terrestrial planet, and Themis' moons Carpo and Auxo and Erebus' moon Khaos is nearly as large. Each of the giant planets and some smaller bodies are encircled by of ice, dust and moonlets. The asteroid belt, which lies between the orbits of Adrestia-Thrax and Themis, contains objects composed of rock, metal and ice. Beyond Cetus' orbit lie the and, which are populations of objects composed mostly of ice and rock.

In the outer reaches of the Solar System lies a class of minor planets called. There is considerable debate as to how many such objects there will prove to be, and active exploration is being carried out by the various space agencies of Tellurus' countries. Some of these objects are large enough to have rounded under their own gravity and thus to be categorized as dwarf planets. Various small-body populations, including, and s, freely travel between the regions of the Solar System.

The, a stream of charged particles flowing outwards from Lurus, creates a bubble-like region of in the  known as the. The is the point at which pressure from the solar wind is equal to the opposing pressure of the interstellar medium; it extends out to the edge of the scattered disc. The, which is thought to be the source for , may also exist at a distance roughly a thousand times further than the heliosphere. The Solar System is located 26,000 light-years from the center of the galaxy.