At the Beginnig of our modern Times, Scientists believed in a invisible Substance, that filled the Room between the Stars and Galaxies, so that it transports Light to us. This unkown Substance not measurable they called "Ether". it a Paradox, because if it existented, it would damp every Movement of the Planets and dim the incoming Light. Up there a Sketch, how the "Ether" may have filled the Room then. In the 19. Century it was displaced by the Theory of Relativity, which can explain many Phenomena much better, but of course is not perfect. Theories are just that: Human Models of Thinking! I am am very curious about, what Theory will come next and what Dimensions it will open to us! :) (As all good Things can become annoying, repeated too often, I think its best to stop this Series for Objects in the Universe here to set forth, when Ideas and Interest has grown again. Maybe I can surprise with other Projects! ;) Have a good Day and move carefully through the "Ether"! ;)