All of the solar system and beyond is a symbol for our consciousness, and outer space represents the far reaches of that part of your psyche that you can be aware of but that you can never quite know with a degree of intimacy or clarity. Dreams that take place in outer space have an existential element that may indicate that you are pondering the higher notions of your humanity.
[1]Dreams of outer space symbolize your awareness of the infinite nature of the world, solar system, and universe. This dream is expanding the parameters of your normal, everyday thinking, and offering you solutions, inspiration and a higher vision.
[2]To dream of outer space represents your creativity. This dream may also indicate that something or someone in your life has just came out of nowhere.
[3]1. Creativity.
2. Contemplation of long journey.
3. The unknown.
[4]Vastness, separation, Gen. 1:7, Ps. 19:1-3
[5]