Rrühmastian
Rrühmastian is a fictional planet located in the Kepler-186 system. It is the fifth and outermost known planet orbiting the red dwarf star Kepler-186, situated approximately 500 light-years from Earth. Rrühmastian is believed to be a rocky planet, similar in size and mass to Earth, though its exact composition is still under scientific investigation.
The planet resides within the habitable zone of its star, the region where conditions might be suitable
Due to the nature of its host star, Kepler-186, Rrühmastian receives less stellar radiation than Earth receives