Amazon boss Jeff Bezos says it's time to go back to the moon, but this time to stay.

He says Humans will have to leave the Earth and the planet will become just a "residential" zone.

He's told a space conference that the coming years will see much of the heavy industry on Earth moved onto other planets, the moons and even asteroids.

Bezos wants to have his rocket company Blue Origin join with Nasa and the European Space Agency to establish a colony on the Moon.

He says doing so should be relatively easy, since the moon is fairly near to us and has a store of water that could be used to create fuel.