Popular Astronomy, Volume 44

altitude amateur angle apparent diameter appear appulse asteroid Astronomical Society azimuth bright celestial equator celestial sphere circle clouds Cluster College comet computed conjunction constellations crater Decl distance earth eclipse Ephemeris fall field FIGURE fireball Galactic Globular Cluster Harvard Harvard College Observatory Harvard Observatory heaven height horizon inches interest July June Jupiter kamacite latitude Leonids light curve long-period variables longitude lunar magnitude maximum Mercury meridian meteor meteorite million miles Miss month moon will occur motion Nebula Neptune night Nininger Nova object observations Observatory October orbit Orionids path penumbral period Perseids photographic planets plates plotted POPULAR ASTRONOMY position present Professor radiant reports right ascension rotation Saturn seconds of arc seen shower sidereal solar sphere SS Cygni stones surface taenite telescope tion University Uranus variable stars velocity Venus vernal equinox visible writer zenith