2. That could we advance towards the Stars 99 Parts of the whole Distance, and have only 1/100 Part remaining, the Stars would appear little bigger to us than they do here; for they would shew no otherwise than they do through a Telescope, which magnifies an Hundred-fold. 3. That at least Nine Parts in Ten of the Space between us and the fix'd Stars, can receive no greater Light from the Sun, or any of the Stars, than what we have from the Stars in a clear Night. 4. That Light takes up more time in travelling from the Stars to us, than we in making a _West-India_ Voyage (which is ordinarily perform'd in six Weeks.) That a Sound would not arrive to us from thence in 50000 Years, nor a Cannon-bullet in a much longer time. This is easily computed, by allowing (according to Mr. _Newton_) Ten Minutes for the Journey of Light from the Sun hither, and that a Sound moves about 1300 Foot in a Second. _The Famous Mr. _Isaac Newton_'s Theory of the _Moon_._ This _Theory_ which hath been long expected by all the true Lovers of _Astronomy_, was communicated from Mr. _Newton_ to Dr. _Gregory_, _Astronomy_ Professor at _Oxford_, and by him published in his _Astron. Elem. Philos._ and _Geomet._ p. 336. From whence, as it was lately translated into _English_, I thought fit to insert it here. By this Theory, what by all Astronomers was thought most difficult and almost impossible to be done, the Excellent Mr. _Newton_ hath now effected; _viz._ to determine the Moon's Place even in her Quadratures, and all other Parts of her Orbit, besides the Syzygys, so accurately by Calculation, that the Difference between that and her true Place in the Heavens, shall scarce be above two minutes in her Syzygys, or above three in her Quadratures, and is usually so small, that it may well enough be reckon'd only as a Defect in the Observation. And this Mr. _Newton_ experienced, by comparing it with very many Places of the Moon, observ'd by Mr. _Flamsteed_, and communicated to him. The Royal Observatory at _Greenwich_, is to the West of the Meridian of _Paris_, 2 degrees, 19 minutes. Of _Uraniburgh_, 12 degrees, 51 minutes, 30 seconds. And of _Gedanum_, 18 degrees, 48 minutes. The mean Motions of the Sun and Moon, accounted from the Vernal Æquinox at the Meridian of _Greenwich_, I make to be as followeth. The last Day of _December 1680_, at Noon (_Old Stile_) the mean Motion of the Sun was 9 Signs, 20 degrees, 34 minutes, 46 seconds. Of the Sun's Apogæum, was 3 S. 7 deg. 23 min. 30 seconds. That the mean Motion of the Moon at that time, was 6 S. 1 degree, 45 minutes, 45 seconds. And of her Apogee, 8 S. 4 degrees, 28 minutes, 5 seconds. Of the ascending Node of the Moon's Orbit, 5 S. 24 deg. 14 min. 35 seconds, _&c._