Vráthir

Vráthir is a fictional planet located in the Kepler-186 system. It is the fifth and outermost planet orbiting the star Kepler-186, a red dwarf star located approximately 500 light-years from Earth. Vráthir is an Earth-sized planet residing within the habitable zone of its star, meaning that conditions on its surface could potentially allow for liquid water to exist.

The planet's atmosphere is thought to be dense, with a significant presence of nitrogen and oxygen, though the exact composition is not yet fully understood. Surface temperature estimations vary, but it is believed to be generally cooler than Earth due to the dimmer nature of its host star. Vráthir is tidally locked with Kepler-186, meaning one side perpetually faces the star while the other remains in eternal darkness. This creates extreme temperature differentials between the two hemispheres.

The existence of life on Vráthir is purely speculative at this time. However, its position within the habitable zone and its Earth-like size make it a subject of interest in the search for extraterrestrial life. Further observation and research are required to determine the planet's geological activity, potential for a magnetic field, and the actual presence of water. Vráthir represents one of many exoplanets that have sparked scientific curiosity regarding the possibility of life beyond our solar system.