A Treatise of the System of the World

abfolute afcent Aftronomers alfo almoſt aphelions apparent diameter appear area's arife attract becauſe bodies cauſe celeftial centripetal force circum-folar force Comet common center decreaſe defcend defcribed diminiſhed diſtance diurnal motion duplicate proportion duplicate ratio Earth Ecliptic equal equator errour faid fame fatellite feen felf femi-diameters fenfible fhine fhould fide fince firſt fixed Stars fmall folar fome fpace fphere fplendour fquare fuch fuppofe furface fyzygies gravity greater greateſt head heavens height hour hypothefis increaſe Jupiter leaſt lefs leſs libration light likewife magnitude meaſured Moon Moon's moſt muft muſt nearer nodes obfervations oppofite orbis magnus orbit orbs paffing parallax particles perigee perihelion phænomena Planets pofition quadratures quantity of matter quiefcent radii drawn reafon refpect reprefent revolved rifing right line Saturn ſcarce ſeen ſmall ſpace Sun's Syftem tails of Comets teleſcope themſelves thence theſe thofe thoſe tides tion trajectory uſe velocity Venus weft Whence whole