An omnihelion is a theoretical concept in astrophysics that proposes a celestial body or structure that could harness or manipulate solar energy from all directions. The term combines "omni," meaning all, and "helion," derived from "helios," the Greek word for sun. While primarily a speculative idea, it suggests advanced technologies that could potentially capture solar energy more efficiently than traditional means. Currently, there are no known practical implementations of an omnihelion.