What exactly is Space? This is a fundamental area. As soon as we attempt to address such a question, and get beyond simplistic “Nothingness”, we find ourselves in serious trouble – for nowhere can we find a total absence of everything – the Ultimate Void!
Perhaps the place we usually consider to deliver it must be so-called Outer Space –the “empty” gaps between the heavenly bodies, but we cannot even be sure of that. Can we say that every single morsel of anywhere (even in that Outer Space) contains absolutely Nothing?
And, the reason for this is surely the very fact of Light Propagation! There can be no doubt that Light is coming in to us from literally every direction, and the more our telescopes improve, the more previously invisible sources are found to exist and can be seen.
Such ideas beg the question “Doesn’t Light need something to propagate it though Space – must it not have some form of vehicle or medium to transmit it?” As you can see, the question isn’t entirely trivial, is it? Our assumption that it is totally empty is a useable simplification, in many circumstances, but it surely is not the last word?
And these questions are not only concerning its nature. For as soon as we get into such questions, other problems arise, for whatever we consider, we have to “ensure” (if that is possible) that what we extract from Reality, and consider and manipulate are valid concepts, and are dealt with via valid methods.
Yes, Space is quite a subject. So, let us proceed!
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