The moon in the ice heart comes from the cloud of the moon.
From the clouds of the moon.
There are many theories about the formation of the moon: homology theory, that is, the earth and the moon were formed at the same time, and were captured by the earth's satellites at first, that is, the moon was originally a planet, but it was captured and split after entering the earth's magnetic field, that is, the earth's initial rotation speed was very fast, and a piece of material was thrown into the moon cloud because the water evaporated from the earth gathered in the upper atmosphere.