Oblivion

Oblivion is a super earth three-hundred times larger than earth and only one of two celestial body in the system, with its massive moon Gemini residing in close orbit. This close position of its moon has resorted in Oblivion being both extremely tectonically unstable and volcanic, with the pull of its moons gravity causing the lava it produces to behave in a extremely atypical way. The unique and incredible delicate environment of Oblivion sees the lava it produces thrown so high into the atmosphere that it is drawn towards Gemini gravitational field. This has created massive funnel like Volcano and numerous asteroids circling Oblivion, with the massive contrast range of temperature range between the surface of the planet and space causing snap freezing. So sudden is the process when coupled with how close the moon is to Oblivion, giant snaking columns of rock actually connect the two worlds.

History
Oblivion's creation is a mystery even to those Humans who settled it during the closing years of the Great Crusade. What is understood is that before Mankind's 'occupation' of the world the planet was ruled by a now all but extinct alien species that was annihilated by an unconfirmed Space Marine Legion. It is believed that these aliens somehow managed to fix Gemini's orbit to either prevent it crashing into Oblivion or deliberately placed it there to encourage tectonic and volcanic activity to make mining on the world easier. However recent investigations of ruins beneath Gemini suggest that the aliens who were removed like Humanity had simple found the world's as well.

Despite this mystery the planet quickly became a major mining world...

Government
The Planet does not possess any form of Government with all mining activity run by the Oblivion Harvesting Corporation on Gemini.

Atmosphere
The Atmosphere of Oblivion is nearly constantly in flux with gasses year round being pumped into the atmosphere by the massive chimney like Volcanoes and seas of toxic chemicals that are often evaporated by sudden exposure to lava. Added with the intense gravitational pull of the planet such the atmosphere on Oblivion is one of the thickest and most poisonous in the Imperium. With a pressure that would easily crush an ordinary human even with proper protection, forcing whoever goes down to the planet to go down in massive portable mining rigs called Galleys, and to wear Oblivion patented HEPH Armor

Environment and Weather
Due to the volatile nature, intense heat and how frequently eruptions occur on Oblivion the few outsiders who have ever ventured down to the planets surface have noted that its hellish visage is comparable to that of tales of Daemon worlds. With lakes of lava suddenly rising into the atmosphere with titanic explosions and massive twisting mountains of rock and metal that would normally crumble under their own weight on a normal world.

However while it is true that under normal circumstances that these massive mountains would crumble and these lakes would sit still. The unique nature of Oblivions moon and Gemini's seemingly fixed position above the planet has led the two bodies gravitational interfering and canceling each other out allowing for features that would only appear on low gravity worlds.

These features however only occur on the side of Oblivion facing the planets moon Gemini, due to its twin being able to be fixed in real space by colossal and ill-understood Xenos stasis technology. Allowing its twins gravity to continue to exert a presence over Oblivion and people to live on its surface, but preventing it from moving away from the side of Oblivion it is always facing.

A unique quality of Oblivions environment is the asteroid belt which surrounds the planet, swirling like a titanic storm as rocks fly around the planet slamming into each other and clumping together. This collision eventually results in massive asteroids that grow to such a size that they are quickly pulled back down to Oblivion by the planets intense gravity. As such Oblivion is nearly always trapped in perpetual meteor showers, otherwise known as 'Hell Falls' by the local miners, who live in constant fear of being crushed or incinerated by massive flaming balls of rock.

Of course the planet also suffers from lava rain, better known as incineration storms, when one of the worlds fifty super volcanoes erupt. Along with toxic fumes pumped out by the Volcano's and opened fissures, creating thick fogs of deadly chemicals, which often when hot enough can burn through a miners HEPH protection.

Fauna
Surprisingly enough despite the planet seeing one of the most deadly places in the galaxy the planet also possess several different forms of wild life. All of which are tungsten based meaning they are naturally made of metal, but are to small to pose any threat to humans, but have become infamous as pests due to their metallic shells forcing people to use las Weaponry on them.