Quintessence and phantom fields, two hypotheses formulated using data from satellites are among the many theories that try to explain the nature of dark energy. Now researchers suggest that both possibilities are only a mirage in the observations and it is the quantum vacuum which could be behind this energy that moves our universe. Cosmologists believe that some three quarters of the universe are made up of a mysterious dark energy which would explain its accelerated expansion. The truth is that they do not know what it could be, therefore they put forward possible solutions.
from Space & Time News — ScienceDaily http://ift.tt/QhenzT