Poross

Poross is a fictional planet featured in the science fiction novel "Project Hail Mary" by Andy Weir. In the narrative, Poross is a large, rocky planet orbiting a red dwarf star. It is known for its extreme environmental conditions, including a thin atmosphere, low surface temperatures, and intense stellar radiation. These conditions make the planet largely inhospitable to complex life as understood on Earth.

The primary significance of Poross in "Project Hail Mary" lies in its role as a celestial body studied by the protagonist, Ryland Grace. Through observations and data analysis, Grace learns crucial information about the astrophage, an alien microorganism that consumes stellar energy and poses a threat to Earth's sun. Poross's unique environment and its interaction with the astrophage are key elements in understanding the full scope of the threat and the potential solutions. The planet serves as a scientific laboratory within the story, allowing for the investigation of extraterrestrial phenomena and the development of strategies to combat the astrophage infestation. Its stark and challenging nature underscores the vastness and often unforgiving realities of space exploration.