To dream of a scientific vacuum or “vacuum in space” represents feelings a situation staying the same indefinitely. Emotional emptiness that purposely disallows anything else to happen in a situation at all.
A vacuum may reflect powerful jealousy, guilt, bitterness, or anger that is obsessed with sterilizing all progress some area of your life. Unhappiness that wants nobody else happy either. Feelings about stasis you can’t do anything about.
Alternatively, a scientific vacuum may reflect feelings about a vacated area of your life causing powerful influences.