The Worlds of Space; a Series of Popular Articles On Astonomical Subjects
The Worlds of Space; a Series of Popular Articles On Astonomical Subjects
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But such a remarkable change of hue is not well estab- lished. It seems more probable that the idea of change is due to the mistranslation of a word applied to the star by the ancient writers, a word which probably referred to its brightness rather than its colour. Pr t SIRIUS AND ITS SYSTEM. 163 T. J. J. See has, however, recently collected strong evidence from the classical writers to show that Sirius was really a red star in ancient times. Such a change would, of course, be most interesting ...and remarkable, indicating, as it would, some wonderful change in the star's chemical constitution.
Like many other stars, Sirius has a considerable " proper motion " across the face of the sky, amounting to about 1*3" of arc per annum. Some irregularities in this proper motion led the astronomers Bessel, Peters, and Safford to the conclusion that the motion of Sirius was disturbed by the attraction of an in- visible close companion revolving round it. From the recorded observations Peters computed an orbit for the supposed companion, and found a period of about 50 years.
What to read after The Worlds of Space; a Series of Popular Articles On Astonomical Subjects?
You can find similar books in the "Read Also" column, or choose other free books by J Ellard John Ellard Gore to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
But such a remarkable change of hue is not well estab- lished. It seems more probable that the idea of change is due to the mistranslation of a word applied to the star by the ancient writers, a word which probably referred to its brightness rather than its colour. Pr t SIRIUS AND ITS SYSTEM. 163 T. J. J. See has, however, recently collected strong evidence from the classical writers to show that Sirius was really a red star in ancient times. Such a change would, of course, be most interesting ...and remarkable, indicating, as it would, some wonderful change in the star's chemical constitution.
Like many other stars, Sirius has a considerable " proper motion " across the face of the sky, amounting to about 1*3" of arc per annum. Some irregularities in this proper motion led the astronomers Bessel, Peters, and Safford to the conclusion that the motion of Sirius was disturbed by the attraction of an in- visible close companion revolving round it. From the recorded observations Peters computed an orbit for the supposed companion, and found a period of about 50 years.
What to read after The Worlds of Space; a Series of Popular Articles On Astonomical Subjects?
You can find similar books in the "Read Also" column, or choose other free books by J Ellard John Ellard Gore to read onlineMoreLess
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