The Observatory, Volume 56Editors of the Observatory, 1933 Some vols. for 1886- include a special issue: Annual companion to the Observatory. |
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Page 213
... spectrum is plausible if there is a great abundance of hydrogen present in the nebula , its applica- tion to the He I spectrum and to the He II spectrum appears to be invalid , for the rate of recombination of the helium ions cannot be ...
... spectrum is plausible if there is a great abundance of hydrogen present in the nebula , its applica- tion to the He I spectrum and to the He II spectrum appears to be invalid , for the rate of recombination of the helium ions cannot be ...
Page 246
... spectrum of Uranus , observed also by Keeler at the Lick Observatory . When I began the study of the spectra of the planets , thirty years ago , it was difficult to photograph the spectrum much beyond A6000 on the available commercial ...
... spectrum of Uranus , observed also by Keeler at the Lick Observatory . When I began the study of the spectra of the planets , thirty years ago , it was difficult to photograph the spectrum much beyond A6000 on the available commercial ...
Page 363
... spectrum showed a marked change in the decrement of the Balmer series , the intensity falling off very rapidly from Ha to the successive members . of the series . In 1933 , the continuous spectrum is stronger than in 1931 , and the ...
... spectrum showed a marked change in the decrement of the Balmer series , the intensity falling off very rapidly from Ha to the successive members . of the series . In 1933 , the continuous spectrum is stronger than in 1931 , and the ...
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Common terms and phrases
absorption appears astrographic Astronomer Royal atmosphere atom bands bright BRITISH ASTRONOMICAL ASSOCIATION calcium Cambridge Cape catalogue central intensities centre chromosphere clock colour comet comparison stars computed correction corresponding craters Crommelin curve Decl density determined discussion distance double stars Earth eclipse effect electrons emission ephemeris equation equatorial Eros frequency galaxies George Darwin give given Greaves Greenwich hydrogen instrument interest investigation ionisation Jupiter km./sec latitude layer light lines longitude magnetic magnitude mean measured meridian meteorite meteors method motion nebulæ observations Observatory obtained orbit oscillator paper period photographs planet planetary plates position possible present President probable error Prof Professor Quadrantids radial velocities radiation Right Ascension rotational speed Sir Arthur Eddington Sir Frank Dyson slide Solar Activity spectra spectrograph spectrum spot Steavenson stellar Sun's sunspot surface tables telescope temperature theory University variable variable stars variation wave-length zero