Annaion
Annaion is a fictional planet featured in the science fiction novel "Project Hail Mary" by Andy Weir. In the story, Annaion is a habitable exoplanet located in the Tau Ceti star system. It is known for its unique atmosphere, which is rich in nitrogen and contains a significant amount of argon. This atmospheric composition plays a crucial role in the narrative, as it affects the behavior of the alien life forms encountered by the protagonist.
The planet's surface is characterized by a diverse range of environments, including vast oceans, rocky continents,
One of the most significant aspects of Annaion in "Project Hail Mary" is its role in the