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 167
... intensity of the line , and the observed height in the chromosphere . The theory of the true central intensities of lines is as yet in a chaotic state : it is not yet certain whether collisions are responsible for central intensities ...
... intensity of the line , and the observed height in the chromosphere . The theory of the true central intensities of lines is as yet in a chaotic state : it is not yet certain whether collisions are responsible for central intensities ...
Page 275
... intensity , and if its value were measured it would probably be found to be identical with the central intensities of the lines which appear dark by contrast . So far as I understand the matter , the difficulty arises mainly from the ...
... intensity , and if its value were measured it would probably be found to be identical with the central intensities of the lines which appear dark by contrast . So far as I understand the matter , the difficulty arises mainly from the ...
Page 292
... intensity of a ray of frequency v Απν is reduced by the factor exp- ( 4 K ( v ) ) . It is for atomic theory to determine the function ( v ) , from which the structure of the line can be calculated in any particular case . We shall ...
... intensity of a ray of frequency v Απν is reduced by the factor exp- ( 4 K ( v ) ) . It is for atomic theory to determine the function ( v ) , from which the structure of the line can be calculated in any particular case . We shall ...
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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