CometsWilliams & Wilkins, 1930 - 246 pagina's |
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according angle appeared assumed Astr astronomical bands Biela body bright calculated changes CHAPTER coma coming companion conclusions connected considered continuous December diameter direct discovered distance Earth effects elements envelopes equal evidently explained fact faint February force four further give given Halley's Comet head Hence interval January June Jupiter known least length less light lines magnitude March mass material matter meteors miles motion move nearly night November nucleus object observations Observatory October once opinion orbit origin parabola particles passed perihelion perihelion passage period perturbations photographed planets plate position possible present pressure probably proved rays reason recorded relative seems seen September short showed shower side similar smaller solar spectra spectrum star stream TABLE tail theory third tion trace units usual visible weeks whole writer
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Readings in the Physical Sciences, Volume 1 Harlow Shapley,Helen Wright,Samuel Berder Rapport Fragmentweergave - 1948 |