Popular Astronomy, Volume 13; Volume 1905

Algol angle appear Aquilae astronomers Austr belt canals Carinae catalogue Centauri Cephei Ceti coefficient comet computed constellation coördinates Crucis curve d h d h dates Decl declination determined differential distance double stars Earth eclipse elements Ephemeris equation error faint Flamsteed Geminorum given gives Goodsell Observatory Greenwich Greenwich Mean Harvard Harvard College Observatory Harvard Observatory Herculis instrument July June Jupiter latitude Lick Observatory light longitude Lyræ magnetic magnitude maximum mean measures meridian meteors method minimum Moon motion observations Ophiuchi orbit pair Persei photographs Piazzi planet plates POPULAR ASTRONOMY position Professor radiation right ascension RV Scorpii Sagittarii satellite seen Sept solar spectroscope spectrum spot sun-spots Sun's surface telescope Thoth tion Triang U. S. Naval Observatory Variable Stars Velorum Virginis visible Vulpeculae VY Cygni