The presence is just an abstract speculation. In fact, everything, what you can allowed to see in you eyes is a picoseconds biased into past. You cannot see a presence due the limited speed of energy spreading, so you can have virtually nothing at present - not just some Aether. By definition, the Aether is unobservable for us from arbitrarily distant perspective, not just from "present" perspective. It manifests itself just by its causal effects, by the same way, like underwater influents the surface water spreading. But the underwater isn't visible by these waves, so we cannot see the vacuum by using of light as well.
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