Popular Astronomy, Volume 58Goodsell Observatory of Carleton College, 1950 |
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Page 10
... changes in the amplitude and shape of the curve ; and there are occasionally long interruptions with no perceptible variation in velocity . When the velocity does change , there is an apparent periodicity with P = 21⁄2 hours . Simi- lar ...
... changes in the amplitude and shape of the curve ; and there are occasionally long interruptions with no perceptible variation in velocity . When the velocity does change , there is an apparent periodicity with P = 21⁄2 hours . Simi- lar ...
Page 11
... changes in the epoch . There would be oscil- lations in the brightness of such a star - P . Guthnick and R. H. Baker observed them in Gamma Ursae Minoris - but they would be subject to the same inconsistencies as the radial velocities ...
... changes in the epoch . There would be oscil- lations in the brightness of such a star - P . Guthnick and R. H. Baker observed them in Gamma Ursae Minoris - but they would be subject to the same inconsistencies as the radial velocities ...
Page 41
... changes were observed in the spectrum until the star was down to about the 10th magni- tude , when emission cores appeared in the H and K lines . These strengthened toward minimum light and other low excitation lines appeared . The ...
... changes were observed in the spectrum until the star was down to about the 10th magni- tude , when emission cores appeared in the H and K lines . These strengthened toward minimum light and other low excitation lines appeared . The ...
Contents
FR SECCHI AND STELLAR SPECTRA MARTIN F MCCARTHY S J | 153 |
STRUCTURE AND COMPOSITION OF CANYON DIABLO | 169 |
RADIO WHISTLES SIDNEY VAN DEN BERGH | 177 |
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AAVSO absolute magnitudes absorption Adams American angle appeared Arizona Astronomical Society atmosphere August Barringer Meteorite Crater bright California Canyon Diablo circle classification College comet coördinates curve density Department of Astronomy determined diameter Diedrich Director dome earth eclipse equator Greenwich Harvard Harvard College Observatory Hertzsprung Holden instrument interest iron July June Jupiter latitude Lick Observatory lines luminosity mass maximum meeting meteor Meteoritic Falls Meteoritical Society Mexico minor planets moon motion Mount Wilson mountain Museum node Notes Nova observed OCCULTATIONS VISIBLE paper parallaxes photographic plates present President Professor radial velocity radiation recent refractor Rosebrugh Russell Saturn Schmidt schreibersite Secchi servatory shows solar specimens spectra spectral class spectroscopic spectrum SS Cygni stellar Sunspot surface Taur tektites telescope temperature theory tion University Variable Star velocity VISIBLE IN LONGITUDE Yerkes Yerkes Observatory