the Planetary Worlds.
17
Book I.
our Plates, but muſt ſtill think that thoſe thin Plates or Rods of which I there taught the Uſe, not to detract from the due Praiſes of ſo uſeful an Invention, are more convenient than the Micrometers.
In this proportion of the Planets it is worth while to take notice of the prodigious Magnitude of the Sun in compariſon with the four innermoſt, which are far leſs than Jupiter and Saturn. And ’tis remarkable, that the Bodies of the Planets do not increaſe together with their Diſtances from the Sun, but that Venus is much bigger than Mars.
The Earth juſtly likened to the Planets, and the Planets to it.Having thus explained the two Schemes, there’s no Body I ſuppoſe but ſees, that in the firſt the Earth is made to be of the ſame ſort with the reſt of the Planets. For the very Poſition of the Circles ſhows it. And that the other Planets are round like it, and like it receive all the Light they have from the Sun, there’s no room (ſince the Diſcoveries made by Teleſcopes) to doubt. Another Thing they are like it in is, that they are mo-B 4
ved
