shadow-squares
Large orbiting structures around the Ringworld that cast shadows and intercept significant sunlight, possibly used as thermoelectric generators.
1 chapter across 1 book
Ringworld (1970)Larry Niven
In this chapter, the crew aboard the Liar debates the risks of approaching the Ringworld's surface and the mysterious shadow squares, which are large orbiting structures that intercept more sunlight than the Ringworld itself. Despite tensions among the crew, especially between the cautious puppeteer and the aggressive kzin Speaker, they decide to investigate the shadow squares more closely. The chapter culminates in the ship being attacked by an unknown hostile force using X-ray lasers, signaling the beginning of open conflict and revealing the dangerous nature of the Ringworld's inhabitants.