A Treatise of the System of the World

abſolute afcent almoſt alſo aphelions apparent diameter appear area's arifing aſtronomers attract becauſe bodies cauſe centripetal force circum-folar force Comet decreaſe denſity deſcribe diminiſhed diſtance diurnal motion duplicate proportion duplicate ratio Earth Ecliptic equator errour faid fame fatellite firſt fixed Stars Flamsteed folar fome fuch furface gravity greater greatest head heavens height hour increaſe iſlands Jupiter laſt leaſt leſs libration light magnitude mean diſtance meaſured Moon Moon's moſt muſt nearer nodes obſervations oppoſite orbis magnus orbit orbs parallax particles paſs paſſed perigee perihelion phænomena Planets poſition quadratures quantity of matter quiefcent radii drawn raiſe reaſon repreſent reſpect reſt revolved rifing right line riſe ſame Saturn ſcarcely ſeen ſelf ſenſible ſeveral ſhine ſhores ſhould ſide ſmall ſmoak ſome ſometimes ſpace ſphere ſplendour ſquare ſuch Sun's ſuppoſe ſyzygies tails of Comets teleſcope thence theſe thoſe tides tion trajectory uſe velocity Venus Whence whole whoſe