The Astrophysical Journal, Volumul 10University of Chicago Press, 1899 "Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online. |
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Pagina 87
... displacement of stellar lines with reference to the lines of an artificial comparison spectrum , giving a means of determining the velocity of stars in the line of sight . The measurement of the radial motion of stars , first attempted ...
... displacement of stellar lines with reference to the lines of an artificial comparison spectrum , giving a means of determining the velocity of stars in the line of sight . The measurement of the radial motion of stars , first attempted ...
Pagina 118
... displaced 4107.58 E +0.20 4109.88 E +0.22 4118.62 E +0.22 Very distinct ; sharply bounded 4H2.15 E +0-33 4181.85 E +0.22 Weak, but distinct 4199.19 E +0.16 Weak, but distinct 4260.64 E + 1.00 Very distinct 4271.30 A —0.05 4271-93 E + ...
... displaced 4107.58 E +0.20 4109.88 E +0.22 4118.62 E +0.22 Very distinct ; sharply bounded 4H2.15 E +0-33 4181.85 E +0.22 Weak, but distinct 4199.19 E +0.16 Weak, but distinct 4260.64 E + 1.00 Very distinct 4271.30 A —0.05 4271-93 E + ...
Pagina 101
... displacements due to tempera- ture variations negligible , and the lines accurately identified . The instrumental adjustments were always made with the great care requisite in velocity measurements , and the measured and computed ...
... displacements due to tempera- ture variations negligible , and the lines accurately identified . The instrumental adjustments were always made with the great care requisite in velocity measurements , and the measured and computed ...
Pagina 107
... displacement of the lines equal to one division of the micrometer , is easily calculated . V1 - λ 299860 gives the velocity in kilometers per second corresponding to a displacement of one tenth - meter . From Hartmann's formula we have ...
... displacement of the lines equal to one division of the micrometer , is easily calculated . V1 - λ 299860 gives the velocity in kilometers per second corresponding to a displacement of one tenth - meter . From Hartmann's formula we have ...
Pagina 113
... displacement by corresponding motions in the line of sight , and all of the hypotheses proposed at that time as to ... displaced in the same direc- tion as in case of Nova Aurigae . Since , further , two other objects , Lyrae and P Cygni ...
... displacement by corresponding motions in the line of sight , and all of the hypotheses proposed at that time as to ... displaced in the same direc- tion as in case of Nova Aurigae . Since , further , two other objects , Lyrae and P Cygni ...
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Termeni și expresii frecvente
absorption aperture apparatus appear astronomers ASTROPHYSICAL JOURNAL axis bands blackening Board of Visitors bolometer bright lines brighter camera carbon catalogue cents chromosphere cluster Coin comparison compound spectrum corona corresponding curve density determined diameter disk displacement eclipse electrodes employed equal error exposure faint stars Fe lacking focal length given gives Harvard College Observatory hydrogen lines inches instrument intensity investigation Keeler Lick Observatory light line of sight luminosity magnitude maximum mean measured mercury vapor Messier 13 metallic meteors micrometer mirror Morris Travers Naval Observatory objective observations obtained orbit oxygen photographs photometric Pickering plate position Potsdam pressure prism Professor radiation rays refractor region ring nebula Scheiner screw slit spark spectra spectrograph spectroheliograph spectroscope stellar telescope temperature tenth-meters tion trum tube University of Chicago Ursae vanadium Variable Stars Variable Velocity visual W. W. Campbell wave-lengths wedge Widely separated Yerkes Observatory
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Pagina 49 - EMGs were sampled with surface electrodes for ten revolutions at the beginning, in the middle and at the end of each work...
Pagina 272 - When an appointment or detail is to be made to the office of astronomical director, director of the Nautical Almanac, astronomer, or assistant astronomer, the board of visitors may recommend to the Secretary of the Navy a suitable person to fill such office, but such recommendation shall be determined only by a majority vote of the members present at a regularly called meeting of the board held in the city of Washington.
Pagina 197 - The officers of the Society shall consist of a President, two Vice Presidents, a Secretary...
Pagina 197 - Society to serve for a period of one year, and two members shall be chosen annually to serve for a period of two years or until their successors are duly elected and qualified.
Pagina 272 - The board of visitors shall prepare and submit to the Secretary of the Navy regulations prescribing the scope of the astronomical and other researches of the Observatory and the duties of its staff with reference...
Pagina 357 - PRINTERS AND BINDERS THE PRINTING OF BOOKS DEMANDING TASTE AND CAREFUL EXECUTION, PRIVATE EDITIONS, COLLEGE CATALOGUES AND ANNUALS A SPECIALTY. WE PRINT MORE FINE BOOKS THAN ALL OTHER HOUSES WEST OF NEW YORK. OUR NEW FACTORY, RUN ENTIRELY BY ELECTRICITY, IS THE MOST ADVANCED PRINTING PLANT IN THE COUNTRY. THE LAKESIDE PRESS BLDG., PLYMOUTH PLACE, COR. POLK, CHICAGO.
Pagina 384 - Sold in quart bottles only, by Druggists and high-class Grocers. Prepared only by Henry B. Platt, Platt Street, New York.