Best to supply a Sutta reference for this kind of question rather than just begin "It is said".Sacha G wrote:It is said that craving is the origin of the world.
Now according to the theory of rebirth, I can understand that craving is the origin of the 5 personal (or internal) khandhas. But what about external phenomena? Do they also originate in craving? For example: trees, mountains, the sun, the moon, the stars???
The word used in this sutta is loka and as already pointed out this doesn't mean so much planet or universe, I think a better translation in this context is probably "reality".
So craving is the origin of our reality.
So of course while trees, mountains, the sun, the moon, the stars are not things that we create you and I might create them differently in our differing experiences of reality, the point being this is a product of our craving rather than of direct perception.