Theris

Theris is a fictional planet featured in the science fiction novel "The Sparrow" by Mary Doria Russell. It is the primary destination of the first contact mission to an alien civilization, the *Sophians*. Theris is described as a world with a unique ecosystem and a technologically advanced, yet deeply religious, sentient species.

The planet's atmosphere is breathable for humans, though with some notable differences from Earth's. The dominant intelligent life form, the Sophians, are described as resembling large, slender insects with complex social structures and a profound connection to their faith. Their civilization has developed advanced technology, including interstellar travel, which they have used to visit other worlds, though their encounters with other species have been limited.

The narrative of "The Sparrow" unfolds as the mission to Theris attempts to understand the Sophians and their culture. However, unforeseen events and cultural misunderstandings lead to tragic consequences for the human crew. Theris serves as a setting for exploring themes of faith, communication, and the challenges inherent in interspecies contact. The planet's environment and the nature of the Sophians are integral to the plot's development and the novel's philosophical explorations.