Astronomy, in Five Books, Volume 1

aftronomers alfo alſo ancient angle apparent diameter apparent magnitude appear axis becauſe cauſe circle circle of latitude confequently conftellations courſe declination degree deſcribed diſtance diurnal motion drawn earth eaſt ecliptic ellipfis equal equator faid fame feconds feen feet femicircle femidiameter fhew fhip fide fince firſt fituation fixt ſtars fome fometimes fouth fquare ftar fuch fun's fuppofe furface globe gnomon greateſt heaven height horizon increaſe inferior planets interfecting jupiter latitude lefs leſs London longeſt longitude magnitude mars meaſure meridian height miles moon moſt motion muſt nearer neareſt obfervations oblique oppofite orbit paffing parallax parallel paſs plane pole preſent Ptolemy reaſon refraction repreſent rhumb Ricciol round ſame ſeen ſeveral ſhadow ſhall ſhe ſhip ſhould ſmall ſome ſphere ſquare ſtars ſtrait line ſuch ſuppoſe tangent teleſcope theſe thofe thoſe triangle tropic uſe venus viſible weft zenith