Trisolaris is a fictional planet featured in the science fiction novel series "The Three-Body Problem" by Liu Cixin. It orbits three suns, leading to extreme and unpredictable climate changes that challenge the survival of its inhabitants, the Trisolarans. The unique environment of Trisolaris creates a society that is highly adaptive and technologically advanced. The Trisolarans seek to escape their unstable planet and explore the possibility of colonizing Earth, which sets the stage for conflict and interaction between the two civilizations.