To dream that it is the end of the world, suggests that you are under a tremendous level of stress. You may be feeling vulnerable or helpless in some situation.
To dream that you are saving the world, signifies confidence in your abilities and belief in yourself. You do not let others question your intelligence or your abilities and generally have a good perspective on life and what your goals are. Don’t let someone or something prevent you from progressing forward.
If you dream of being in outer space looking back at the world, you are creative and a loyal friend.