Protiumissa
Protiumissa is a fictional planet featured in the science fiction novel "The Martian" by Andy Weir. It is not a real celestial body. In the narrative of "The Martian," Protiumissa is the home planet of the human colony that has established a presence on Mars. The colonists on Mars are from Protiumissa, implying a future where humanity has expanded beyond Earth and established a new civilization on another world. The planet itself is not described in detail within the novel, serving primarily as the origin point for the characters and the larger context of their mission. The focus of "The Martian" is on the survival of astronaut Mark Watney after he is left stranded on Mars, and the efforts to rescue him. Protiumissa represents the advanced technological and societal capabilities of humanity in this future setting, enabling interstellar travel and colonization.