If you are in outer space in your dream, you are out of touch with what is happening in your world. Perhaps you feel out of place.
If you are enjoying outer space, you are desiring to escape Earth... the real world. You'd rather play in the imaginary world or seek adventures elsewhere than the events in your life.
If you are afraid of being in outer space it that means that there is much imaginary fear in what is new and unknown. A fear of change. There is no real danger. The fear is all in the mind and there is vast consciousness waiting for you in space.
Space is also a vacuum of activity. Perhaps your subconscious is asking you to take some personal quiet time out for your self to gain infinite wisdom from your own library of wisdom.
