Celsiusta

Celsiusta is a fictional planet featured in the science fiction novel "The Martian" by Andy Weir. It is the home planet of the Martian species, an alien race with advanced technology. Celsiusta is described as a world with a thin atmosphere and a predominantly rocky surface, subject to frequent dust storms. The planet's inhabitants, the Martians, are depicted as having evolved to survive in this harsh environment. They are portrayed as being highly intelligent and resourceful, with a society that prioritizes scientific advancement and environmental sustainability.

The novel explores the concept of first contact between humans and the Martians. While the Martians are not physically present in the narrative of "The Martian," their civilization and their past interactions with Earth are alluded to. Their existence is revealed through ancient Martian artifacts discovered on Mars, which provide clues about their history and their technological capabilities. The Martians are presented as a benevolent species, having once visited Earth millennia ago and leaving behind warnings about humanity's potential for self-destruction. Their advanced understanding of physics and engineering is evident in the technology they left behind, including the powerful propulsion system that Earth scientists eventually decipher and utilize. The concept of Celsiusta serves as a backdrop for the Martians' origin and their advanced civilization, adding a layer of cosmic context to the human struggle for survival on Mars.