Still, Titan is the glass of Earth — except everything familiar there's made of commodity differently, If Europa is the ocean beneath the ice. On Titan, gutters inflow, rain falls, shadows drift, and swell coruscate in the sun. But none of it's water. The gutters and lakes are made of liquid methane and ethane, hydrocarbons that would be gas on Earth. It’s a world that feels alive and alien at the same time. Let’s break it down. The First Casts Titan was discovered in 1655 by Christiaan Huygens, a Dutch astronomer who gazed through a crude telescope and spotted a small companion ringing