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In consequence, mathematicians were enabled in the course of the nineteenth century to conceive the most varied space-systems which were all mathematically consistent and yet lacked all relation to external existence. A considerable number of space-systems have thus become established among which there is the system that served Einstein to derive his space-time concept.
As long as he exists, at any point in space-time, Hradzka is still a threat. Revenge means much to Hradzka; he will return for it, when we least expect him." The old man shook his head. "No, Zarvas Pol, Hradzka will not return." Hradzka holstered his blaster, threw the switch that sealed the "time-machine", put on the antigrav-unit and started the time-shift unit.
The "Time-Machine" was not a vehicle; it was a mechanical process of displacement within the space-time continuum, and those who constructed it knew that it could not be used with the sort of accuracy that the dials indicated.
We usually express this fact by adopting our natural space-time system and by talking of the path in space of the material particle as it exists at successive instants of time. We have to ask ourselves what are the laws of nature which lead the material particle to adopt just this path among event-particles and no other. Think of the path as a whole.
The physical and emotional shock of the conversion hit Jack and Tiger like a sledge hammer, and during the long hours while the ship was traveling through the time-less, distance-less universe of the drive to the pre-set co-ordinates where it materialized again into conventional space-time, the Earthmen were retching violently, too sick to budge from the bunk room.
Anyhow, it's not your space-time, though some say it's your world." "You mean dimensional travel?" Dave asked. He'd seen something about that on a science-fiction television program. It made even time travel seem simple. At any event, however, this wasn't a hospital in any sane and normal section of Canada during his time, on Earth. "Something like that," she agreed doubtfully.
They'd have detection, and he knew what they were detecting a clump of sixteen rending distortions of the fabric of space-time, as sixteen ships came into sudden existence in the normal continuum. Beside him, Bentrik had a screen on; it was still milky-white, and he was speaking into a radio hand-phone. "Simon Bentrik, Prince-Protector of Marduk, calling Moonbase."
I have discussed this example in order to make you realise that in thinking of the possibilities of measurement in the space-time manifold, we must not confine ourselves merely to those minor variations which might seem natural to human beings on the earth. Suppose that we name it the p-system of measurement.
The stretched-out, graded, striving world of biological evolution, the many-faced universe of the physical relativist, the space-time manifold of realist philosophy these great constructions of human thought, so often ignored by the religious mind, must on the contrary be grasped, and accommodated to the world-view which centres on the God known in religious experience.
Instead, he divested the concepts of space and time, from which that of velocity is usually derived, of the absoluteness hitherto attributed to them, with the result that in his theory time has come to be conceived as part of a four-dimensional 'space-time continuum'. In reality the Michelson-Morley experiment presents no problem requiring such labours as those of Einstein for its solution.
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