Titan is a term that can refer to several different things. In Greek mythology, Titan was one of the twelve gods who ruled the universe before being overthrown by Zeus and the other Olympians. The name also refers to any member of a race of giants in ancient literature or folklore.
In astronomy, Titan is the largest moon orbiting Saturn, known for its thick atmosphere and hydrocarbon lakes. It was named after the mythological figure by the astronauts who discovered it during the Voyager missions in the 1980s.
Finally, "titan" can also refer to something or someone of exceptional strength, size, or power - a reference back to its use in Greek mythology as a term for giants.