Earth

Earth is the third planet in the Solar System. It is a planet inhabited by humans.

Appearances
According to the Planet Minecraft page, the player and several others were abducted from Earth by the aliens, and the aim of the map is to fight back so you can go home.

From teaser screenshots and the two teaser trailers, two Earth-like areas are seen - one in a city next to a beach, and the other in a mountainous area, which seems to be where the Celestipede is fought.

Trivia

 * On the large globe of Earth seen on the Planet Minecraft page, the moon can also be seen a short distance away.