Having just read Fred Hoyle's book The Nature of the Universe, he had the idea that Longman's design resembled a spiral galaxy.
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Chemical Galaxy is a new representation by Philip Stewart of the periodic system of the elements, better known in tabular form as the periodic table, based on the cyclical nature of characteristics of the chemical elements (which depend principally on the valence electrons).
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John D. Clark was the first to present a spiral with an oval outline.
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A revised version, Chemical Galaxy II, introduces a new scheme, inspired by Michael Laing, for coloring the lanthanides and actinides, to bring out parallels with the transition metals.
His love of both chemistry and astronomy led him in 2004 to publish a new representation of the periodic system of the elements - Chemical Galaxy.
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