ælstr

Ælstr is a fictional planet located in the Kepler-186 star system, approximately 500 light-years from Earth. It is the fifth and outermost known planet in this system, orbiting a red dwarf star. The planet is estimated to be roughly 1.2 times the size of Earth and is situated within its star's habitable zone, suggesting the potential for liquid water on its surface.

Initial spectral analysis of Ælstr's atmosphere indicates the presence of nitrogen and oxygen, along with trace amounts of other gases. This composition has led to scientific speculation about the possibility of life, though no direct evidence has been found. The surface of Ælstr is believed to be characterized by a varied terrain, including potential oceans, continents, and mountain ranges. Its orbital period is longer than Earth's, resulting in distinct seasonal patterns. Research into Ælstr continues through advanced telescopic observations and theoretical modeling, with ongoing efforts to further understand its environmental conditions and potential for habitability.