Astronomy explained upon Sir Isaac Newton's principles. And made easy to those who have not studied mathematics. To which are added, A plain method of finding the distances of all the planets from the sun, by the transit of Venus over the sun's disc, in the year 1761. An account of Mr. Horrox's observation of the transit of Venus in ... 1639 ... / By James Ferguson.

James Ferguson

Date:: 1809

Credit: Astronomy explained upon Sir Isaac Newton's principles. And made easy to those who have not studied mathematics. To which are added, A plain method of finding the distances of all the planets from the sun, by the transit of Venus over the sun's disc, in the year 1761. An account of Mr. Horrox's observation of the transit of Venus in ... 1639 ... / By James Ferguson. Source: Wellcome Collection.

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$| CTrAr an | Ai brief Defcription of the Souar SysTEM. - 17.) }\xe Sun, with the Planets and Comets PLATEL | L which move round him astheircenter, con- “” ftitute the Solar Syfiem. » Thofe Planets which are The Solar near the Sun not only finifh their circuits fooner, 7 but likewife rove fafter in their refpective Orbits, - than thofe which.are more remote from him. Their motions are all performed from weft to eaft, in Orbits nearly circular, Their names, diftances, bulks, and periodical revolutions, are as follow: 18. The Sun ©; an immenfe globe,’ 1s placed tie sua, near the: common center, or rather in-the lower* | The diameter of theSun is computed to be 763,000 rig. 1, pins are fixed are called the foci or Focufes of the ellipfis. The © = =F é ° =P 2. ob . @ rs = S c — wn pe) Lar] ® ofl Ls ge) 26 oO ©. ated vw pt) 5 pon ot = @ Xd p) co ~ a wm *S — ps) io) ® [oe / Vere + According to M. Caffini the time 6f the rotation of the Sun js performed in 25 days 14-hours and § min, M. du Sejour a3) oe BR ase on Bie makes’$

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