Popular Astronomy, Volume 15; Volume 1907

Algol Algol Type Androm angle appears Aquarii Aquilae astronomers Aurigae axis bright Camelop Cancri Capricorni Cassiop catalogue Cephei Ceti comet computed coördinates Cygni Decl Delphini determined diameter direction disk distance double stars Draconis Earth eclipse elements Ephemeris equation error faint fainter Geminorum given gives Goodsell Observatory Greenwich Mean gyroscope h d h Harvard Harvard College Observatory Herculis hour July June Jupiter latitude Lick Observatory light curve longitude Lyrae magnitude mass mathematics mean measures meridian meteors method minima Moon Moon's observations Observatory Ophiuchi orbit parallax Pegasi perihelion period Persei photographic planet plates pole POPULAR ASTRONOMY position probably Professor proper motions refraction right ascension rotation Sagittarii satellites Saturn Sept solar sphere spot stellar Sun's surface tables Tauri telescope temperature theory tion Variable Stars velocity Virginis visible