Popular Astronomy, Volume 50Goodsell Observatory of Carleton College, 1942 |
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Page 173
... Spectra of Long - Period Variables , ” by Paul W. Merrill . No. 645. " Absorption Spectra of Gases in the Extreme Ultraviolet , " by Toshio Takamine and Yoshio Tanaka , No. 646. " The Mean Absolute Magnitudes of Stars of Spectral Types ...
... Spectra of Long - Period Variables , ” by Paul W. Merrill . No. 645. " Absorption Spectra of Gases in the Extreme Ultraviolet , " by Toshio Takamine and Yoshio Tanaka , No. 646. " The Mean Absolute Magnitudes of Stars of Spectral Types ...
Page 344
... Spectra - Discussion chairman , R. A. Fisher , Northwestern . ( 1 ) Atomic Spectra of the Rare Earth Elements , W. F. Meggers , Bureau of Standards . Tuesday , June 23 , 6:00 P.M. Conference Dinner . Wednesday , June 24 , 9:30 A.M. ...
... Spectra - Discussion chairman , R. A. Fisher , Northwestern . ( 1 ) Atomic Spectra of the Rare Earth Elements , W. F. Meggers , Bureau of Standards . Tuesday , June 23 , 6:00 P.M. Conference Dinner . Wednesday , June 24 , 9:30 A.M. ...
Page 375
... spectra , several Gaertner spectroscopes , some direct - vision spectroscopes and some gratings are used . Vacuum tubes are used for sources of hydrogen , helium , and mercury bright- line spectra . Flame spectra of sodium , strontium ...
... spectra , several Gaertner spectroscopes , some direct - vision spectroscopes and some gratings are used . Vacuum tubes are used for sources of hydrogen , helium , and mercury bright- line spectra . Flame spectra of sodium , strontium ...
Contents
Bolide observed A bright 451 | 114 |
STELLAR DISTANCES FREDERICK SLOCUM | 117 |
METEORITIC FOSSILS BEN HUR WILSON | 125 |
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absolute magnitude American American Astronomical Society American Meteor Society angle appeared Astronomical Society atmosphere average azimuth changes College comets constellation craters Cygni diameter direction distance earth eclipse end point ephemeris errors fireball galactic galaxies given height horizon indicated instruments July June Jupiter latitude Lick Observatory light curve longitude luminosity lunar Mare Imbrium Mars maxima maximum mean measured meridian meteor meteorite method miles minimum moon motion nebulae Notes novae object observations Observatory obtained OCCULTATIONS Ohio orbit paper parallax path perihelion phenomena photographs planet POPULAR ASTRONOMY position predicted present probably problem projectile radiation region reports rotation seen solar spectra spectral type spectrum SS Cygni stellar sunspot surface Table telescope tion train University Variable Star variation velocity Venus visible Yerkes Observatory zenith Zodiacal Light