|First Appearance:||Detective Comics #27|
Earth is the home planet of Batman and the vast majority of the individuals he encountered. Earth is just one life-compatible planet of the Milky Way galaxy, which itself is just one of countless galaxies in the Universe.
On rare occasions Batman would depart Earth to join the Justice League of America, help extraterrestrial beings, or being taken hostage by hostile extraterrestrials.
Batman was born Bruce Wayne in Gotham City, of the United States of America on planet Earth. A close friend and ally of his, Superman was born on Krypton, a planet millions of lightyears away from Earth.
- Virtually every storyline that Batman, and his allies and enemies appear in.