Space 
To see or dream that you are in space indicates that you are a very inquisitive person who enjoys seeking the truth. You form your own opinions and beliefs rather than adopting those of others.
Spaceship
To dream of a spaceship indicates that you are imaginative and artistic. It suggests that you should embark on a mission of inner discovery and comprehension. Change your outlook on a certain issue, even if it seems strange and peculiar.
Outer Space
To dream of outer space suggests the sudden appearance of something or someone out of nowhere.
UFO
To dream of an UFO represents that you need to find a more devout purpose in your life. On the other hand, when you see an UFO in your dream may also point out that you are feeling separation by those around you. The dream can also be a metaphor for you having a 'dazed' or 'spacey' attitude. You may need to become a bit more realistic and come back to earth.
Room
To dream that you are in a room relates to a particular aspect of your personality or relationship with people. Dreams about different rooms may correlate to subconscious thoughts, desires, and facets of your identity.
To dream that you find or discover new rooms signifies new vitality, growing emotional maturity, and capability in meeting new challenges.
To see a comfortable room signifies wealth and satisfaction in real life.
To notice a dark, scary, or small room connotes feelings of being penned up, trapped, or repressed.
*See Bathroom or Kitchen
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Silo
To dream of a silo implies that you should be more frugal with your finances. It's possible that you are purchasing items that you don't need or are too expensive. You should instead try to save and accumulate a nest egg.
Galaxy
To dream about the galaxy signifies your imagination. It also indicates that you are taking in the big picture and are more in touch with the world and events around you.
Vacuum
To dream of a vacuum represents the emptiness you may feel in your waking life. There is something missing. Conversely, the vacuum may be a reminder that we all need to spend time cleaning up our acts on occasion.
To dream that you are using a vacuum is an indication that you have lost control over a waking life situation.
Voyage
To dream of taking a voyage or a long trip implies great luck and fortune. You will soon receive the benefits of an inheritance. Be aware, as it may not be money!
Conversely, if you see yourself taking a voyage that ends poorly, consider those around you. Your love may not be faithful to you.
Aliens
If you dream about aliens, it symbolizes an unfamiliar or strange situation. This can be viewed in either a positive or negative way, depending on the context of your dream. Feelings of fear when dreaming of aliens indicate that you are either not ready or deliberately holding something back. Feelings of curiosity toward the aliens indicate that you are willing to take a risk and roll with the punches.
The presence of aliens in your dream may also point to subconscious feelings of resentment. Take the time to look at your relationships and be sure to let someone know if they are overstepping boundaries or making you uncomfortable in some way.
Alternatively, an alien in your dream can be symbolic of hope. Dreaming of an alien is your subconscious mind letting your conscious mind know that there is hope in what has otherwise been a seemingly hopeless situation. Do not give up!
Postcard
To dream of a postcard suggests you should be candid and accessible.
Infinity
To dream of infinity represents the future and the many challenges which it will present. Dreaming about infinity indicates that you are on a journey of growth and self-improvement.
To dream of an infinity which appears vast and beautiful indicates a mind which is naturally curious. You are looking forward to tackling the challenges which lie ahead.
To dream of an infinity which is intimidating symbolizes the difficulty of moving forward with a problem. You may be struggling with the large number of possible choices, paths, or solutions available. You seek direction in your life which may come in the form of a guide or simple good advice.
Universe
To dream of the universe represents vast possibility.
To dream that you are master of the universe symbolizes your control over your own destiny.
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