Green Lantern is the name of several fictional superheroes that appear in comic books published by DC Comics. The first was Alan Scott and was created by writer Bill Finger and artist Martin Nodell in All-American Comics #16 in July 1940.
The most famous is Hal Jordan and was created by John Broome and Gil Kane in Showcase #22 in October 1959.
Each Green Lantern wears a power ring that allows the Green Lantern to control the physical world by strength of will.