Alasterea

Alasterea is a fictional planet located in the Kepler-186 star system. It is the fifth and outermost known planet orbiting the red dwarf star Kepler-186, situated at a distance of approximately 500 light-years from Earth. Alasterea resides within the habitable zone of its star, meaning conditions on its surface could potentially allow for the existence of liquid water.

The planet is believed to be rocky, with a size comparable to that of Earth, although its exact mass and composition are not yet definitively known. Its orbit is relatively long, taking about 130 Earth days to complete a single revolution around Kepler-186. Due to the nature of red dwarf stars, which are cooler and dimmer than our Sun, Alasterea would likely receive less light and energy than Earth. This could result in a colder climate, though atmospheric conditions could play a significant role in regulating surface temperatures.

The discovery of Alasterea, along with other planets in the Kepler-186 system, was made using data from the Kepler Space Telescope. The search for exoplanets like Alasterea is a key area of astronomical research, aiming to understand the prevalence of potentially habitable worlds beyond our solar system. Further observations and advancements in telescope technology are needed to gather more detailed information about Alasterea's atmosphere, geology, and the possibility of life.

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