Fictional symbols

flag designs intended to be used on Mars, or simply representing the planet

fictional gesture of salutation from Star Trek

magic in Harry Potter

eight-arrowed symbol originally devised by Michael Moorcock

The Bat-Signal is a distress signal device appearing in American comic books published by DC Comics, as a means to summon the superhero Batman. It is a specially modified searchlight with a stylized emblem of a bat affixed to the light, allowing it to project a large bat symbol onto cloudy night skies over Gotham City.

emblem of the comic book superhero Superman