The designation “Heart of the Sun” within the context of No Man’s Sky refers to a specific type of star system. These systems are characterized by stars belonging to the O-class, which are extremely hot and luminous. Such stellar bodies emit intense radiation and possess a relatively short lifespan compared to smaller, cooler stars. For example, encountering a system with an O-class star in No Man’s Sky signifies a unique and challenging environment.
The presence of an O-class star, or “Heart of the Sun” star, profoundly impacts the resources and planet types that may be found within the system. These systems often contain rare and valuable materials, making them desirable destinations for experienced explorers. Historically, locating these systems has been a goal for players seeking advanced technology blueprints, exotic ships, and lucrative trading opportunities, though the inherent dangers pose a significant risk. The extreme heat and radiation necessitate advanced environmental protection for both ships and exosuits.