Kaledos

Kaledos is a fictional planet featured in the science fiction novel "The Mote in God's Eye" by Larry Niven and Jerry Pournelle. It is the homeworld of the Moties, an alien species encountered by humanity. Kaledos is described as a tidally locked world with a permanently sunlit side and a perpetually dark side. The habitable zone for the Moties is a twilight region between these two extremes.

The planet's environment is harsh, with extreme temperature differences between the sunlit and dark sides. The Moties have adapted to this challenging environment, developing a complex society and advanced technology. Their civilization is highly structured and hierarchical, with a strong emphasis on cooperation and efficiency. Kaledos is a resource-rich world, which has allowed the Moties to develop sophisticated engineering and manufacturing capabilities.

The novel explores the interactions between humanity and the Moties, focusing on the cultural differences and potential conflicts arising from their encounter. Kaledos serves as the backdrop for much of this interaction, highlighting the Moties' unique evolutionary path and their struggle for survival in a demanding ecosystem. The planet's characteristics play a significant role in shaping the Moties' biology, society, and technological advancements.