Popular Astronomy, Volume 42

amateur Amateur Telescope Makers American Meteor Society apparent diameter appeared Astronomical Society axis bright computed CYGNI Decl distance earth eclipse ephemeris Est.Obs fireball Halley's Comet J.D.Est J.D.Est.Obs Leonids Lick Observatory longitude Losap magnitude meteor meteorites million miles month motion Nininger Observatory orbit perihelion period Perseids photographs Planetarium planets plotted Professor recorded reported seconds of arc seen solar solar eclipses SS CYGNI Star J.D. STAR OBSERVATIONS RECEIVED stone telescope tion VARIABLE STAR OBSERVATIONS Venus Zodiacal Light