Sajfe

Sajfe is the 2nd planet from the Sun. This planet is quite unique as it is the only carbon planet within the Solar System. It is also the hottest planet in the Solar System.

Formation
Sajfe is thought to have once been a rogue planet from a different solar system, since carbon planets are a rare find. Brown dwarfs are thought to be the sole bearers of carbon and hydrocarbon-rich planets, so Sajfe might have originated from a failed star system and migrated to the current Solar System.

Atmosphere
Sajfe is primarily a carbon planet, so most of its atmosphere consists of carbon-based gases such as carbon monoxide, methane, and carbon dioxide. Ammonia, argon, and other toxic gases also dominate its atmosphere but at a lesser percentage. The layer is quite thick that, according to the Amme Observatory, a case of severe smog in Huayalo isn't comparable to the impenetrable view of Sajfe's surface.

Surface
Sajfe's surface is littered with bituminous coal along with silver and silicon carbide lakes scattered across the surface. The coal is of a very light composition and makes up the majority of the mountainous-like regions of the planet. Many of the metallic lakes; however, do have solid bits of microscopic silver particles embedded within. Sajfe might have been bombarded by meteorites containing significant amounts of pure silver at one point in its history.

Planetary Layers
Sajfe has a inner solid steel core. It doesn't contain a outer core; the reason for this is unclear. Past the inner core is the thickest layer, the graphite layer. This layer consists entirely of hydrocarbon-sourced graphite with pressurized diamond deposits within it. The final and outer layer consists of thick crusts made mostly of coal.

Life
Sajfe is most likely not habitable to any currently-known lifeforms. Although, since carbon is the main building block of life, it might potentially host bizzare forms of life that would otherwise be considered alien.

Atmosphere
In about 1.4 billion years, due to its much closer distance to the Sun, Sajfe's atmosphere might rapidly wither away enough to only be able to support a few noble gases.

Surface
It is unknown what Sajfe's surface will look like anytime in the future.

Celestial
It is estimated that, in 1.8 billion years, Sajfe will be absorbed by the Sun.

Trivia

 * Sarhkvse most resembles Venus in its atmospheric composition.