Props Valroa

Antichthon: World on the other side of the sun.

 Antichthon is a world of the same mass of the earth. From space all you can see is the gold colored atmosphere, but as you get closer you can see the planet is mostly black with oceans of murky brown water. Clouds usually are made of soot or ash, some of them are turquoise and made of chemicals that would be deadly to inhale. It's hellishly hot here due to the black absorbing the heat from the sun. 

A big swamp like environment goes over most of the planet, eyes on trees and plants are sentient and deadly, predatory.