Sentence Examples


  • For the special purpose of determining the solar parallax this instrument has been used in a most refined and perfect manner by Dr Halm at the Cape of Good Hope (Annals of the Cape Observatory, vol.
  • From a fresh discussion of the transits of Venus in 1761 and 1769 he deduced (1822-1824) a solar parallax of 8" 57, long accepted as authoritative.
  • To determine the solar parallax by observations of Mars in 1877.
  • A parsec is the distance at which the observed parallax of the star is equal to 1 second of arc.
  • They took advantage of this fact to explain to them that this distance was obtained by measuring the parallax of the moon.

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