Hartimas

Hartimas is a fictional planet featured in the science fiction novel "Project Hail Mary" by Andy Weir. In the story, Hartimas is a gas giant located in the Gliese 581 system. It is notable for its dense atmosphere, which is rich in ammonia and methane, and its powerful magnetic field. The planet is orbited by several moons, including one named Astrophage, which plays a critical role in the novel's plot.

The extreme conditions on Hartimas, such as its high atmospheric pressure and low temperatures, make it uninhabitable for life as humans understand it. However, the planet's unique atmospheric composition and gravitational pull are essential for the survival of the Astrophage, a fictional microorganism that consumes stellar energy and poses a threat to Earth's sun. The protagonist of "Project Hail Mary," Ryland Grace, travels to the Gliese 581 system to study the Astrophage and find a way to neutralize its threat. Hartimas serves as a crucial scientific curiosity and a narrative backdrop for the discovery of solutions to the Astrophage problem. Its characteristics are integral to the scientific plausibility and imaginative scope of the novel.