Earth

Earth is the third planet orbiting the solar system's yellow sun. The planet serves primarily as home to its native race, the human, and came into existence long before the written history of its population. Classified by the Guardians of the Universe as Space Sector 2814.

History
Earth-531, or Prime Earth, was formed in an effort by The Flash to restore the Timestream to its original nature, to prevent Darkseids Reign. This new timeline set this Earth at the center of the multiverse.

In this newly made timeline, costumed crime fighters were a relatively new phenomenon, (since the JSA was moved) with Superman being the first super-powered hero to come to public knowledge.