Sentence Examples


  • AUGUST FERDINAND MOBIUS (1790-1868), German astronomer and mathematician, was born at Schulpforta on the 17th of November 1790.
  • He was the son of Pheidias, an astronomer, and was on intimate terms with, if not related to, Hiero, king of Syracuse, and Gelo his son.
  • As the powers of the telescope were gradually developed, it was found that the finest hairs or filaments of silk, or the thinnest silver wires that could be drawn, were much too thick for the refined purposes of the astronomer, as p p they entirely obliterated the image of a star in the more powerful telescopes.
  • Sir William Herschel was the first astronomer who measured position angles; the instrument he employed is described in Phil.
  • In the middle of this slide a stiffly fitting brass disk is inserted, to which a small turn-table motion may be communicated by an attached arm, acted on by two fine opposing screws accessible to the astronomer; and by their means the " fixed web " may be rendered strictly parallel with the movable one.

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