An Astronomical Vocabulary: Being an Explanation of All Terms in Use Amongst Astronomers at the Present Day

adopted amount ancient northern constellations angle angular distance annual aphelion apparent astronomers axis bright star calculation called caused centre circle conjunction declination diameter difference direction disc discovered distinguished earth ecliptic Edition effect employed equator equinox expressed fixed stars frequently Geography given globe heavenly body heavens Hevelius horizon inferior interval introduced by Lacaille Jupiter known latitude length less light limits London longitude Major March mean measured Mercury meridian minor planets minute moon moon's motion Natural Node object observed opposite orbit Parallax passing perihelion period planet or comet point of Aries poles position present principal star reckoning reference respect revolve right ascension round satellite Saturn seen Sidereal Sir John Herschel situated solar sometimes southern constellations southern constellations introduced sun enters sun's supposed surface tables telescopes termed third transit tropics Uranus usually Venus visible Wood-cuts zenith zodiacal constellations