# 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

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Ferguson, J., Horrocks, J., & Patterson, R. (1806). 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 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. Philadelphia: Matthew Carey. Retrieved from http://catalog.hathitrust.org/Record/006085280