The Appearances of Venus and Mars in 1610

  title={The Appearances of Venus and Mars in 1610},
  author={William T. Peters},
  journal={Journal for the History of Astronomy},
  pages={211 - 214}
As a contribution to the investigation of how Venus and Mars appeared to their first telescopic observers in the latter half of 1610, I calculated their positions and appearances for that time. I also observed Venus with a replica of one of Galileo's telescopes in January 1984, when the planet's appearance was similar to that of October 1610. In what follows I report on the results of these investigations. Venus can be seen in the daytime by an expert observer who knows just where to look, and… Expand
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PLANETS": A computer program for positions and other data concerning the Sun. Moon. and planets
    • 1975),362. W. Sander states that observations over several days must be compared to make the most accurate determination of the apparent dichotomy of Venus
    • Astronomy: A handbook. transl. by Arthur Beer