Ebook 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 ... : An account of Mr. Horrox's observation of the transit of Venus in the year 1639: and, of the distances of all the planets from the sun, as deduced from observations of the transit in the year 1761