Yatim

Yatim, also known as Orbus, is the second permanent natural satellite of Irhan and the second astronomical object known to harbour life alongside Zamin. This like while being extrahumisian, is distantly related to life on Zamin, which was most likely transferred to the satellite through panspermia. The Yatim cradle hypothesis proposes Yatim as the original life bearer, the microorganisms of which were transported to Zamin as a result of a large body impact several billion years ago, but there is not yet any conclusive evidence to prove it, as both planets had the capacity to create primitive life for most of their history.

Yatim is, in geophysical terms, a satellite planet. Within the Solar System, it is the 7th largest planetary-mass object. Its surface gravity, due to lower density of the planet, is slightly lower than that of Zamin. The body of the satellite is near-terrestrial, with some small oceans and seas of water. It has a magnetic field, and, due to the influence of its primary planet, a declining atmosphere, which is currently causing significant harm to local biology. Yatim is a planet tidally locked to Irhan, so that it only receives sunlight on one of its sides, while the other is perpetually locked in darkness. The two sides of the planet possess extreme temperatures, from more than 395°G (~100°C) on the 'bright' side and -289°G (-153°C) on the 'dark' side. It is dominated by a large desert with no winds due to the fact that it does not spin, and all life thus found on the planet is located in the area between perpetual sunlight and darkness, the so-called 'twilight zone', that contains a lot of the climates found on Zamin.

The surface of Yatim is covered by a wide desert on the side facing the light and a permanent glacier on the dark side, both marked by mountains, craters and other signs of geological activity. It is home to a variety of biota not found on Zamin, like the Tyrannotherids, a clade of massive aerial creatures with a wingspan reaching up to 18 metres (59 ft) in length.