What does my dream mean?

ok last night i dreamed about a spaceship taking off, when it took off, all this grey dark smoke came out of it. there smoke was alot that it even came toward my direction. after the smoke disapeared i looked at the sky and i see the spaceship flying. all of a sudden the sky turned into a dark night. then in the middle of the sky i saw the earth rotating and the spaceship orbiting around it. what is this dream trying to tell me or what does it mean? thanks!