1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ASTRONOMY (from Gr. ao-rpov, a star, and vtfitiv, to classify or arrange). The subject matter of astronomical science, considered in its widest range, comprehends all the matter of the universe which lies outside the limit of the earth's atmosphere. The seeming anomaly of classifying as a single 'branch of science all that we know in a field so wide, while subdividing our knowledge of things on our own planet into an indefinite number of separate sciences, finds its explanation in the impossibility of subjecting th…
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- Vol. 2, pp. 800-818