I dreamed that an alien ship came to pick me up and leave the earth.

Dream is a physiological phenomenon, and we can't interpret it yet, because we don't know the principle of dreams yet.

Recommend Freud's dream interpretation

Psychologist Freud believes that dreams are the satisfaction of subconscious desires, and people can effectively suppress the subconscious when they are awake, so that those desires that violate moral customs cannot do whatever they want. However, when people fall asleep or relax, some desires will avoid the inspection of the subconscious, secretly emerge from the conscious level, and show themselves in various images. This is the formation of dreams. Dreams are substitutes for human desires and the main way to release depression. In the form of a fantasy, we can experience the instinctive satisfaction of this dream. The fire of desire hidden in the subconscious mind cannot be satisfied for practical reasons, but the impulse and repression in the subconscious mind constantly struggle to form a pair of contradictions and then form a force. This motivation makes desire find another way or satisfaction, which is a dream.