[[Quantum electrodynamics]] (QED) teaches that when light goes through a [[vacuum]], it is really going through a sea of virtual particles. Cosmologists say that the vacuum is really filled with ''dark energy'', and it is unknown whether that has any relation to the aether concept. According to these theories, there is no such thing as empty space. The aether describes space when it is as empty as possible. | [[Quantum electrodynamics]] (QED) teaches that when light goes through a [[vacuum]], it is really going through a sea of virtual particles. Cosmologists say that the vacuum is really filled with ''dark energy'', and it is unknown whether that has any relation to the aether concept. According to these theories, there is no such thing as empty space. The aether describes space when it is as empty as possible. |